poop-graph/static/chartjs-adapter-date-fns.bundle.js

/*!
 * chartjs-adapter-date-fns v2.0.0
 * https://www.chartjs.org
 * (c) 2021 chartjs-adapter-date-fns Contributors
 * Released under the MIT license
 */
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('chart.js')) :
typeof define === 'function' && define.amd ? define(['chart.js'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Chart));
}(this, (function (chart_js) { 'use strict';

function toInteger(dirtyNumber) {
  if (dirtyNumber === null || dirtyNumber === true || dirtyNumber === false) {
    return NaN;
  }

  var number = Number(dirtyNumber);

  if (isNaN(number)) {
    return number;
  }

  return number < 0 ? Math.ceil(number) : Math.floor(number);
}

function requiredArgs(required, args) {
  if (args.length < required) {
    throw new TypeError(required + ' argument' + (required > 1 ? 's' : '') + ' required, but only ' + args.length + ' present');
  }
}

/**
 * @name toDate
 * @category Common Helpers
 * @summary Convert the given argument to an instance of Date.
 *
 * @description
 * Convert the given argument to an instance of Date.
 *
 * If the argument is an instance of Date, the function returns its clone.
 *
 * If the argument is a number, it is treated as a timestamp.
 *
 * If the argument is none of the above, the function returns Invalid Date.
 *
 * **Note**: *all* Date arguments passed to any *date-fns* function is processed by `toDate`.
 *
 * @param {Date|Number} argument - the value to convert
 * @returns {Date} the parsed date in the local time zone
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // Clone the date:
 * const result = toDate(new Date(2014, 1, 11, 11, 30, 30))
 * //=> Tue Feb 11 2014 11:30:30
 *
 * @example
 * // Convert the timestamp to date:
 * const result = toDate(1392098430000)
 * //=> Tue Feb 11 2014 11:30:30
 */

function toDate(argument) {
  requiredArgs(1, arguments);
  var argStr = Object.prototype.toString.call(argument); // Clone the date

  if (argument instanceof Date || typeof argument === 'object' && argStr === '[object Date]') {
    // Prevent the date to lose the milliseconds when passed to new Date() in IE10
    return new Date(argument.getTime());
  } else if (typeof argument === 'number' || argStr === '[object Number]') {
    return new Date(argument);
  } else {
    if ((typeof argument === 'string' || argStr === '[object String]') && typeof console !== 'undefined') {
      // eslint-disable-next-line no-console
      console.warn("Starting with v2.0.0-beta.1 date-fns doesn't accept strings as date arguments. Please use `parseISO` to parse strings. See: https://git.io/fjule"); // eslint-disable-next-line no-console

      console.warn(new Error().stack);
    }

    return new Date(NaN);
  }
}

/**
 * @name addDays
 * @category Day Helpers
 * @summary Add the specified number of days to the given date.
 *
 * @description
 * Add the specified number of days to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of days to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the days added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 10 days to 1 September 2014:
 * const result = addDays(new Date(2014, 8, 1), 10)
 * //=> Thu Sep 11 2014 00:00:00
 */

function addDays(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var date = toDate(dirtyDate);
  var amount = toInteger(dirtyAmount);

  if (isNaN(amount)) {
    return new Date(NaN);
  }

  if (!amount) {
    // If 0 days, no-op to avoid changing times in the hour before end of DST
    return date;
  }

  date.setDate(date.getDate() + amount);
  return date;
}

/**
 * @name addMonths
 * @category Month Helpers
 * @summary Add the specified number of months to the given date.
 *
 * @description
 * Add the specified number of months to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of months to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the months added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 5 months to 1 September 2014:
 * const result = addMonths(new Date(2014, 8, 1), 5)
 * //=> Sun Feb 01 2015 00:00:00
 */

function addMonths(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var date = toDate(dirtyDate);
  var amount = toInteger(dirtyAmount);

  if (isNaN(amount)) {
    return new Date(NaN);
  }

  if (!amount) {
    // If 0 months, no-op to avoid changing times in the hour before end of DST
    return date;
  }

  var dayOfMonth = date.getDate(); // The JS Date object supports date math by accepting out-of-bounds values for
  // month, day, etc. For example, new Date(2020, 1, 0) returns 31 Dec 2019 and
  // new Date(2020, 13, 1) returns 1 Feb 2021.  This is *almost* the behavior we
  // want except that dates will wrap around the end of a month, meaning that
  // new Date(2020, 13, 31) will return 3 Mar 2021 not 28 Feb 2021 as desired. So
  // we'll default to the end of the desired month by adding 1 to the desired
  // month and using a date of 0 to back up one day to the end of the desired
  // month.

  var endOfDesiredMonth = new Date(date.getTime());
  endOfDesiredMonth.setMonth(date.getMonth() + amount + 1, 0);
  var daysInMonth = endOfDesiredMonth.getDate();

  if (dayOfMonth >= daysInMonth) {
    // If we're already at the end of the month, then this is the correct date
    // and we're done.
    return endOfDesiredMonth;
  } else {
    // Otherwise, we now know that setting the original day-of-month value won't
    // cause an overflow, so set the desired day-of-month. Note that we can't
    // just set the date of `endOfDesiredMonth` because that object may have had
    // its time changed in the unusual case where where a DST transition was on
    // the last day of the month and its local time was in the hour skipped or
    // repeated next to a DST transition.  So we use `date` instead which is
    // guaranteed to still have the original time.
    date.setFullYear(endOfDesiredMonth.getFullYear(), endOfDesiredMonth.getMonth(), dayOfMonth);
    return date;
  }
}

/**
 * @name addMilliseconds
 * @category Millisecond Helpers
 * @summary Add the specified number of milliseconds to the given date.
 *
 * @description
 * Add the specified number of milliseconds to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of milliseconds to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the milliseconds added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 750 milliseconds to 10 July 2014 12:45:30.000:
 * const result = addMilliseconds(new Date(2014, 6, 10, 12, 45, 30, 0), 750)
 * //=> Thu Jul 10 2014 12:45:30.750
 */

function addMilliseconds(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var timestamp = toDate(dirtyDate).getTime();
  var amount = toInteger(dirtyAmount);
  return new Date(timestamp + amount);
}

var MILLISECONDS_IN_HOUR$3 = 3600000;
/**
 * @name addHours
 * @category Hour Helpers
 * @summary Add the specified number of hours to the given date.
 *
 * @description
 * Add the specified number of hours to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of hours to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the hours added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 2 hours to 10 July 2014 23:00:00:
 * const result = addHours(new Date(2014, 6, 10, 23, 0), 2)
 * //=> Fri Jul 11 2014 01:00:00
 */

function addHours(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addMilliseconds(dirtyDate, amount * MILLISECONDS_IN_HOUR$3);
}

/**
 * @name startOfWeek
 * @category Week Helpers
 * @summary Return the start of a week for the given date.
 *
 * @description
 * Return the start of a week for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @param {Object} [options] - an object with options.
 * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
 * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
 * @returns {Date} the start of a week
 * @throws {TypeError} 1 argument required
 * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
 *
 * @example
 * // The start of a week for 2 September 2014 11:55:00:
 * var result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Sun Aug 31 2014 00:00:00
 *
 * @example
 * // If the week starts on Monday, the start of the week for 2 September 2014 11:55:00:
 * var result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
 * //=> Mon Sep 01 2014 00:00:00
 */

function startOfWeek(dirtyDate, dirtyOptions) {
  requiredArgs(1, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  var date = toDate(dirtyDate);
  var day = date.getDay();
  var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
  date.setDate(date.getDate() - diff);
  date.setHours(0, 0, 0, 0);
  return date;
}

/**
 * Google Chrome as of 67.0.3396.87 introduced timezones with offset that includes seconds.
 * They usually appear for dates that denote time before the timezones were introduced
 * (e.g. for 'Europe/Prague' timezone the offset is GMT+00:57:44 before 1 October 1891
 * and GMT+01:00:00 after that date)
 *
 * Date#getTimezoneOffset returns the offset in minutes and would return 57 for the example above,
 * which would lead to incorrect calculations.
 *
 * This function returns the timezone offset in milliseconds that takes seconds in account.
 */
function getTimezoneOffsetInMilliseconds(date) {
  var utcDate = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds(), date.getMilliseconds()));
  utcDate.setUTCFullYear(date.getFullYear());
  return date.getTime() - utcDate.getTime();
}

/**
 * @name startOfDay
 * @category Day Helpers
 * @summary Return the start of a day for the given date.
 *
 * @description
 * Return the start of a day for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a day
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a day for 2 September 2014 11:55:00:
 * const result = startOfDay(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Tue Sep 02 2014 00:00:00
 */

function startOfDay(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setHours(0, 0, 0, 0);
  return date;
}

var MILLISECONDS_IN_DAY$1 = 86400000;
/**
 * @name differenceInCalendarDays
 * @category Day Helpers
 * @summary Get the number of calendar days between the given dates.
 *
 * @description
 * Get the number of calendar days between the given dates. This means that the times are removed
 * from the dates and then the difference in days is calculated.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of calendar days
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many calendar days are between
 * // 2 July 2011 23:00:00 and 2 July 2012 00:00:00?
 * var result = differenceInCalendarDays(
 *   new Date(2012, 6, 2, 0, 0),
 *   new Date(2011, 6, 2, 23, 0)
 * )
 * //=> 366
 * // How many calendar days are between
 * // 2 July 2011 23:59:00 and 3 July 2011 00:01:00?
 * var result = differenceInCalendarDays(
 *   new Date(2011, 6, 3, 0, 1),
 *   new Date(2011, 6, 2, 23, 59)
 * )
 * //=> 1
 */

function differenceInCalendarDays(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var startOfDayLeft = startOfDay(dirtyDateLeft);
  var startOfDayRight = startOfDay(dirtyDateRight);
  var timestampLeft = startOfDayLeft.getTime() - getTimezoneOffsetInMilliseconds(startOfDayLeft);
  var timestampRight = startOfDayRight.getTime() - getTimezoneOffsetInMilliseconds(startOfDayRight); // Round the number of days to the nearest integer
  // because the number of milliseconds in a day is not constant
  // (e.g. it's different in the day of the daylight saving time clock shift)

  return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_DAY$1);
}

var MILLISECONDS_IN_MINUTE$3 = 60000;
/**
 * @name addMinutes
 * @category Minute Helpers
 * @summary Add the specified number of minutes to the given date.
 *
 * @description
 * Add the specified number of minutes to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of minutes to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the minutes added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 30 minutes to 10 July 2014 12:00:00:
 * const result = addMinutes(new Date(2014, 6, 10, 12, 0), 30)
 * //=> Thu Jul 10 2014 12:30:00
 */

function addMinutes(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addMilliseconds(dirtyDate, amount * MILLISECONDS_IN_MINUTE$3);
}

/**
 * @name addQuarters
 * @category Quarter Helpers
 * @summary Add the specified number of year quarters to the given date.
 *
 * @description
 * Add the specified number of year quarters to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of quarters to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the quarters added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 1 quarter to 1 September 2014:
 * const result = addQuarters(new Date(2014, 8, 1), 1)
 * //=> Mon Dec 01 2014 00:00:00
 */

function addQuarters(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  var months = amount * 3;
  return addMonths(dirtyDate, months);
}

/**
 * @name addSeconds
 * @category Second Helpers
 * @summary Add the specified number of seconds to the given date.
 *
 * @description
 * Add the specified number of seconds to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of seconds to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the seconds added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 30 seconds to 10 July 2014 12:45:00:
 * const result = addSeconds(new Date(2014, 6, 10, 12, 45, 0), 30)
 * //=> Thu Jul 10 2014 12:45:30
 */

function addSeconds(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addMilliseconds(dirtyDate, amount * 1000);
}

/**
 * @name addWeeks
 * @category Week Helpers
 * @summary Add the specified number of weeks to the given date.
 *
 * @description
 * Add the specified number of week to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of weeks to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the weeks added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 4 weeks to 1 September 2014:
 * const result = addWeeks(new Date(2014, 8, 1), 4)
 * //=> Mon Sep 29 2014 00:00:00
 */

function addWeeks(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  var days = amount * 7;
  return addDays(dirtyDate, days);
}

/**
 * @name addYears
 * @category Year Helpers
 * @summary Add the specified number of years to the given date.
 *
 * @description
 * Add the specified number of years to the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of years to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the years added
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Add 5 years to 1 September 2014:
 * const result = addYears(new Date(2014, 8, 1), 5)
 * //=> Sun Sep 01 2019 00:00:00
 */

function addYears(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addMonths(dirtyDate, amount * 12);
}

/**
 * @name compareAsc
 * @category Common Helpers
 * @summary Compare the two dates and return -1, 0 or 1.
 *
 * @description
 * Compare the two dates and return 1 if the first date is after the second,
 * -1 if the first date is before the second or 0 if dates are equal.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the first date to compare
 * @param {Date|Number} dateRight - the second date to compare
 * @returns {Number} the result of the comparison
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Compare 11 February 1987 and 10 July 1989:
 * const result = compareAsc(new Date(1987, 1, 11), new Date(1989, 6, 10))
 * //=> -1
 *
 * @example
 * // Sort the array of dates:
 * const result = [
 *   new Date(1995, 6, 2),
 *   new Date(1987, 1, 11),
 *   new Date(1989, 6, 10)
 * ].sort(compareAsc)
 * //=> [
 * //   Wed Feb 11 1987 00:00:00,
 * //   Mon Jul 10 1989 00:00:00,
 * //   Sun Jul 02 1995 00:00:00
 * // ]
 */

function compareAsc(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var diff = dateLeft.getTime() - dateRight.getTime();

  if (diff < 0) {
    return -1;
  } else if (diff > 0) {
    return 1; // Return 0 if diff is 0; return NaN if diff is NaN
  } else {
    return diff;
  }
}

/**
 * @name isValid
 * @category Common Helpers
 * @summary Is the given date valid?
 *
 * @description
 * Returns false if argument is Invalid Date and true otherwise.
 * Argument is converted to Date using `toDate`. See [toDate]{@link https://date-fns.org/docs/toDate}
 * Invalid Date is a Date, whose time value is NaN.
 *
 * Time value of Date: http://es5.github.io/#x15.9.1.1
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * - Now `isValid` doesn't throw an exception
 *   if the first argument is not an instance of Date.
 *   Instead, argument is converted beforehand using `toDate`.
 *
 *   Examples:
 *
 *   | `isValid` argument        | Before v2.0.0 | v2.0.0 onward |
 *   |---------------------------|---------------|---------------|
 *   | `new Date()`              | `true`        | `true`        |
 *   | `new Date('2016-01-01')`  | `true`        | `true`        |
 *   | `new Date('')`            | `false`       | `false`       |
 *   | `new Date(1488370835081)` | `true`        | `true`        |
 *   | `new Date(NaN)`           | `false`       | `false`       |
 *   | `'2016-01-01'`            | `TypeError`   | `false`       |
 *   | `''`                      | `TypeError`   | `false`       |
 *   | `1488370835081`           | `TypeError`   | `true`        |
 *   | `NaN`                     | `TypeError`   | `false`       |
 *
 *   We introduce this change to make *date-fns* consistent with ECMAScript behavior
 *   that try to coerce arguments to the expected type
 *   (which is also the case with other *date-fns* functions).
 *
 * @param {*} date - the date to check
 * @returns {Boolean} the date is valid
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // For the valid date:
 * var result = isValid(new Date(2014, 1, 31))
 * //=> true
 *
 * @example
 * // For the value, convertable into a date:
 * var result = isValid(1393804800000)
 * //=> true
 *
 * @example
 * // For the invalid date:
 * var result = isValid(new Date(''))
 * //=> false
 */

function isValid(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  return !isNaN(date);
}

/**
 * @name differenceInCalendarMonths
 * @category Month Helpers
 * @summary Get the number of calendar months between the given dates.
 *
 * @description
 * Get the number of calendar months between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of calendar months
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many calendar months are between 31 January 2014 and 1 September 2014?
 * var result = differenceInCalendarMonths(
 *   new Date(2014, 8, 1),
 *   new Date(2014, 0, 31)
 * )
 * //=> 8
 */

function differenceInCalendarMonths(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var yearDiff = dateLeft.getFullYear() - dateRight.getFullYear();
  var monthDiff = dateLeft.getMonth() - dateRight.getMonth();
  return yearDiff * 12 + monthDiff;
}

/**
 * @name differenceInCalendarYears
 * @category Year Helpers
 * @summary Get the number of calendar years between the given dates.
 *
 * @description
 * Get the number of calendar years between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of calendar years
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many calendar years are between 31 December 2013 and 11 February 2015?
 * var result = differenceInCalendarYears(
 *   new Date(2015, 1, 11),
 *   new Date(2013, 11, 31)
 * )
 * //=> 2
 */

function differenceInCalendarYears(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  return dateLeft.getFullYear() - dateRight.getFullYear();
}

// for accurate equality comparisons of UTC timestamps that end up
// having the same representation in local time, e.g. one hour before
// DST ends vs. the instant that DST ends.

function compareLocalAsc(dateLeft, dateRight) {
  var diff = dateLeft.getFullYear() - dateRight.getFullYear() || dateLeft.getMonth() - dateRight.getMonth() || dateLeft.getDate() - dateRight.getDate() || dateLeft.getHours() - dateRight.getHours() || dateLeft.getMinutes() - dateRight.getMinutes() || dateLeft.getSeconds() - dateRight.getSeconds() || dateLeft.getMilliseconds() - dateRight.getMilliseconds();

  if (diff < 0) {
    return -1;
  } else if (diff > 0) {
    return 1; // Return 0 if diff is 0; return NaN if diff is NaN
  } else {
    return diff;
  }
}
/**
 * @name differenceInDays
 * @category Day Helpers
 * @summary Get the number of full days between the given dates.
 *
 * @description
 * Get the number of full day periods between two dates. Fractional days are
 * truncated towards zero.
 *
 * One "full day" is the distance between a local time in one day to the same
 * local time on the next or previous day. A full day can sometimes be less than
 * or more than 24 hours if a daylight savings change happens between two dates.
 *
 * To ignore DST and only measure exact 24-hour periods, use this instead:
 * `Math.floor(differenceInHours(dateLeft, dateRight)/24)|0`.
 *
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full days according to the local timezone
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full days are between
 * // 2 July 2011 23:00:00 and 2 July 2012 00:00:00?
 * var result = differenceInDays(
 *   new Date(2012, 6, 2, 0, 0),
 *   new Date(2011, 6, 2, 23, 0)
 * )
 * //=> 365
 * // How many full days are between
 * // 2 July 2011 23:59:00 and 3 July 2011 00:01:00?
 * var result = differenceInDays(
 *   new Date(2011, 6, 3, 0, 1),
 *   new Date(2011, 6, 2, 23, 59)
 * )
 * //=> 0
 * // How many full days are between
 * // 1 March 2020 0:00 and 1 June 2020 0:00 ?
 * // Note: because local time is used, the
 * // result will always be 92 days, even in
 * // time zones where DST starts and the
 * // period has only 92*24-1 hours.
 * var result = differenceInDays(
 *   new Date(2020, 5, 1),
 *   new Date(2020, 2, 1)
 * )
//=> 92
 */


function differenceInDays(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var sign = compareLocalAsc(dateLeft, dateRight);
  var difference = Math.abs(differenceInCalendarDays(dateLeft, dateRight));
  dateLeft.setDate(dateLeft.getDate() - sign * difference); // Math.abs(diff in full days - diff in calendar days) === 1 if last calendar day is not full
  // If so, result must be decreased by 1 in absolute value

  var isLastDayNotFull = compareLocalAsc(dateLeft, dateRight) === -sign;
  var result = sign * (difference - isLastDayNotFull); // Prevent negative zero

  return result === 0 ? 0 : result;
}

/**
 * @name differenceInMilliseconds
 * @category Millisecond Helpers
 * @summary Get the number of milliseconds between the given dates.
 *
 * @description
 * Get the number of milliseconds between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of milliseconds
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many milliseconds are between
 * // 2 July 2014 12:30:20.600 and 2 July 2014 12:30:21.700?
 * var result = differenceInMilliseconds(
 *   new Date(2014, 6, 2, 12, 30, 21, 700),
 *   new Date(2014, 6, 2, 12, 30, 20, 600)
 * )
 * //=> 1100
 */

function differenceInMilliseconds(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  return dateLeft.getTime() - dateRight.getTime();
}

var MILLISECONDS_IN_HOUR$2 = 3600000;
/**
 * @name differenceInHours
 * @category Hour Helpers
 * @summary Get the number of hours between the given dates.
 *
 * @description
 * Get the number of hours between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of hours
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many hours are between 2 July 2014 06:50:00 and 2 July 2014 19:00:00?
 * var result = differenceInHours(
 *   new Date(2014, 6, 2, 19, 0),
 *   new Date(2014, 6, 2, 6, 50)
 * )
 * //=> 12
 */

function differenceInHours(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var diff = differenceInMilliseconds(dirtyDateLeft, dirtyDateRight) / MILLISECONDS_IN_HOUR$2;
  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
}

var MILLISECONDS_IN_MINUTE$2 = 60000;
/**
 * @name differenceInMinutes
 * @category Minute Helpers
 * @summary Get the number of minutes between the given dates.
 *
 * @description
 * Get the signed number of full (rounded towards 0) minutes between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of minutes
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many minutes are between 2 July 2014 12:07:59 and 2 July 2014 12:20:00?
 * var result = differenceInMinutes(
 *   new Date(2014, 6, 2, 12, 20, 0),
 *   new Date(2014, 6, 2, 12, 7, 59)
 * )
 * //=> 12
 *
 * @example
 * // How many minutes are from 10:01:59 to 10:00:00
 * var result = differenceInMinutes(
 *   new Date(2000, 0, 1, 10, 0, 0),
 *   new Date(2000, 0, 1, 10, 1, 59)
 * )
 * //=> -1
 */

function differenceInMinutes(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var diff = differenceInMilliseconds(dirtyDateLeft, dirtyDateRight) / MILLISECONDS_IN_MINUTE$2;
  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
}

/**
 * @name endOfDay
 * @category Day Helpers
 * @summary Return the end of a day for the given date.
 *
 * @description
 * Return the end of a day for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a day
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a day for 2 September 2014 11:55:00:
 * const result = endOfDay(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Tue Sep 02 2014 23:59:59.999
 */

function endOfDay(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setHours(23, 59, 59, 999);
  return date;
}

/**
 * @name endOfMonth
 * @category Month Helpers
 * @summary Return the end of a month for the given date.
 *
 * @description
 * Return the end of a month for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a month
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a month for 2 September 2014 11:55:00:
 * const result = endOfMonth(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Tue Sep 30 2014 23:59:59.999
 */

function endOfMonth(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var month = date.getMonth();
  date.setFullYear(date.getFullYear(), month + 1, 0);
  date.setHours(23, 59, 59, 999);
  return date;
}

/**
 * @name isLastDayOfMonth
 * @category Month Helpers
 * @summary Is the given date the last day of a month?
 *
 * @description
 * Is the given date the last day of a month?
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to check
 * @returns {Boolean} the date is the last day of a month
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // Is 28 February 2014 the last day of a month?
 * var result = isLastDayOfMonth(new Date(2014, 1, 28))
 * //=> true
 */

function isLastDayOfMonth(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  return endOfDay(date).getTime() === endOfMonth(date).getTime();
}

/**
 * @name differenceInMonths
 * @category Month Helpers
 * @summary Get the number of full months between the given dates.
 *
 * @description
 * Get the number of full months between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full months
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full months are between 31 January 2014 and 1 September 2014?
 * var result = differenceInMonths(new Date(2014, 8, 1), new Date(2014, 0, 31))
 * //=> 7
 */

function differenceInMonths(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var sign = compareAsc(dateLeft, dateRight);
  var difference = Math.abs(differenceInCalendarMonths(dateLeft, dateRight));
  var result; // Check for the difference of less than month

  if (difference < 1) {
    result = 0;
  } else {
    if (dateLeft.getMonth() === 1 && dateLeft.getDate() > 27) {
      // This will check if the date is end of Feb and assign a higher end of month date
      // to compare it with Jan
      dateLeft.setDate(30);
    }

    dateLeft.setMonth(dateLeft.getMonth() - sign * difference); // Math.abs(diff in full months - diff in calendar months) === 1 if last calendar month is not full
    // If so, result must be decreased by 1 in absolute value

    var isLastMonthNotFull = compareAsc(dateLeft, dateRight) === -sign; // Check for cases of one full calendar month

    if (isLastDayOfMonth(toDate(dirtyDateLeft)) && difference === 1 && compareAsc(dirtyDateLeft, dateRight) === 1) {
      isLastMonthNotFull = false;
    }

    result = sign * (difference - isLastMonthNotFull);
  } // Prevent negative zero


  return result === 0 ? 0 : result;
}

/**
 * @name differenceInQuarters
 * @category Quarter Helpers
 * @summary Get the number of full quarters between the given dates.
 *
 * @description
 * Get the number of full quarters between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full quarters
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full quarters are between 31 December 2013 and 2 July 2014?
 * var result = differenceInQuarters(new Date(2014, 6, 2), new Date(2013, 11, 31))
 * //=> 2
 */

function differenceInQuarters(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var diff = differenceInMonths(dirtyDateLeft, dirtyDateRight) / 3;
  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
}

/**
 * @name differenceInSeconds
 * @category Second Helpers
 * @summary Get the number of seconds between the given dates.
 *
 * @description
 * Get the number of seconds between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of seconds
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many seconds are between
 * // 2 July 2014 12:30:07.999 and 2 July 2014 12:30:20.000?
 * var result = differenceInSeconds(
 *   new Date(2014, 6, 2, 12, 30, 20, 0),
 *   new Date(2014, 6, 2, 12, 30, 7, 999)
 * )
 * //=> 12
 */

function differenceInSeconds(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var diff = differenceInMilliseconds(dirtyDateLeft, dirtyDateRight) / 1000;
  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
}

/**
 * @name differenceInWeeks
 * @category Week Helpers
 * @summary Get the number of full weeks between the given dates.
 *
 * @description
 * Get the number of full weeks between two dates. Fractional weeks are
 * truncated towards zero.
 *
 * One "full week" is the distance between a local time in one day to the same
 * local time 7 days earlier or later. A full week can sometimes be less than
 * or more than 7*24 hours if a daylight savings change happens between two dates.
 *
 * To ignore DST and only measure exact 7*24-hour periods, use this instead:
 * `Math.floor(differenceInHours(dateLeft, dateRight)/(7*24))|0`.
 *
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full weeks
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full weeks are between 5 July 2014 and 20 July 2014?
 * var result = differenceInWeeks(new Date(2014, 6, 20), new Date(2014, 6, 5))
 * //=> 2
 *
 * // How many full weeks are between
 * // 1 March 2020 0:00 and 6 June 2020 0:00 ?
 * // Note: because local time is used, the
 * // result will always be 8 weeks (54 days),
 * // even if DST starts and the period has
 * // only 54*24-1 hours.
 * var result = differenceInWeeks(
 *   new Date(2020, 5, 1),
 *   new Date(2020, 2, 6)
 * )
 * //=> 8
 */

function differenceInWeeks(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var diff = differenceInDays(dirtyDateLeft, dirtyDateRight) / 7;
  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
}

/**
 * @name differenceInYears
 * @category Year Helpers
 * @summary Get the number of full years between the given dates.
 *
 * @description
 * Get the number of full years between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full years
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full years are between 31 December 2013 and 11 February 2015?
 * var result = differenceInYears(new Date(2015, 1, 11), new Date(2013, 11, 31))
 * //=> 1
 */

function differenceInYears(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var sign = compareAsc(dateLeft, dateRight);
  var difference = Math.abs(differenceInCalendarYears(dateLeft, dateRight)); // Set both dates to a valid leap year for accurate comparison when dealing
  // with leap days

  dateLeft.setFullYear('1584');
  dateRight.setFullYear('1584'); // Math.abs(diff in full years - diff in calendar years) === 1 if last calendar year is not full
  // If so, result must be decreased by 1 in absolute value

  var isLastYearNotFull = compareAsc(dateLeft, dateRight) === -sign;
  var result = sign * (difference - isLastYearNotFull); // Prevent negative zero

  return result === 0 ? 0 : result;
}

/**
 * @name startOfQuarter
 * @category Quarter Helpers
 * @summary Return the start of a year quarter for the given date.
 *
 * @description
 * Return the start of a year quarter for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a quarter
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a quarter for 2 September 2014 11:55:00:
 * const result = startOfQuarter(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Tue Jul 01 2014 00:00:00
 */

function startOfQuarter(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var currentMonth = date.getMonth();
  var month = currentMonth - currentMonth % 3;
  date.setMonth(month, 1);
  date.setHours(0, 0, 0, 0);
  return date;
}

/**
 * @name startOfMonth
 * @category Month Helpers
 * @summary Return the start of a month for the given date.
 *
 * @description
 * Return the start of a month for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a month
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a month for 2 September 2014 11:55:00:
 * const result = startOfMonth(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Mon Sep 01 2014 00:00:00
 */

function startOfMonth(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setDate(1);
  date.setHours(0, 0, 0, 0);
  return date;
}

/**
 * @name startOfYear
 * @category Year Helpers
 * @summary Return the start of a year for the given date.
 *
 * @description
 * Return the start of a year for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a year
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a year for 2 September 2014 11:55:00:
 * const result = startOfYear(new Date(2014, 8, 2, 11, 55, 00))
 * //=> Wed Jan 01 2014 00:00:00
 */

function startOfYear(dirtyDate) {
  requiredArgs(1, arguments);
  var cleanDate = toDate(dirtyDate);
  var date = new Date(0);
  date.setFullYear(cleanDate.getFullYear(), 0, 1);
  date.setHours(0, 0, 0, 0);
  return date;
}

/**
 * @name endOfYear
 * @category Year Helpers
 * @summary Return the end of a year for the given date.
 *
 * @description
 * Return the end of a year for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a year
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a year for 2 September 2014 11:55:00:
 * var result = endOfYear(new Date(2014, 8, 2, 11, 55, 00))
 * //=> Wed Dec 31 2014 23:59:59.999
 */

function endOfYear(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var year = date.getFullYear();
  date.setFullYear(year + 1, 0, 0);
  date.setHours(23, 59, 59, 999);
  return date;
}

/**
 * @name endOfHour
 * @category Hour Helpers
 * @summary Return the end of an hour for the given date.
 *
 * @description
 * Return the end of an hour for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of an hour
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of an hour for 2 September 2014 11:55:00:
 * const result = endOfHour(new Date(2014, 8, 2, 11, 55))
 * //=> Tue Sep 02 2014 11:59:59.999
 */

function endOfHour(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setMinutes(59, 59, 999);
  return date;
}

/**
 * @name endOfWeek
 * @category Week Helpers
 * @summary Return the end of a week for the given date.
 *
 * @description
 * Return the end of a week for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @param {Object} [options] - an object with options.
 * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
 * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
 * @returns {Date} the end of a week
 * @throws {TypeError} 1 argument required
 * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
 *
 * @example
 * // The end of a week for 2 September 2014 11:55:00:
 * const result = endOfWeek(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Sat Sep 06 2014 23:59:59.999
 *
 * @example
 * // If the week starts on Monday, the end of the week for 2 September 2014 11:55:00:
 * const result = endOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
 * //=> Sun Sep 07 2014 23:59:59.999
 */
function endOfWeek(dirtyDate, dirtyOptions) {
  requiredArgs(1, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  var date = toDate(dirtyDate);
  var day = date.getDay();
  var diff = (day < weekStartsOn ? -7 : 0) + 6 - (day - weekStartsOn);
  date.setDate(date.getDate() + diff);
  date.setHours(23, 59, 59, 999);
  return date;
}

/**
 * @name endOfMinute
 * @category Minute Helpers
 * @summary Return the end of a minute for the given date.
 *
 * @description
 * Return the end of a minute for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a minute
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a minute for 1 December 2014 22:15:45.400:
 * const result = endOfMinute(new Date(2014, 11, 1, 22, 15, 45, 400))
 * //=> Mon Dec 01 2014 22:15:59.999
 */

function endOfMinute(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setSeconds(59, 999);
  return date;
}

/**
 * @name endOfQuarter
 * @category Quarter Helpers
 * @summary Return the end of a year quarter for the given date.
 *
 * @description
 * Return the end of a year quarter for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a quarter
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a quarter for 2 September 2014 11:55:00:
 * const result = endOfQuarter(new Date(2014, 8, 2, 11, 55, 0))
 * //=> Tue Sep 30 2014 23:59:59.999
 */

function endOfQuarter(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var currentMonth = date.getMonth();
  var month = currentMonth - currentMonth % 3 + 3;
  date.setMonth(month, 0);
  date.setHours(23, 59, 59, 999);
  return date;
}

/**
 * @name endOfSecond
 * @category Second Helpers
 * @summary Return the end of a second for the given date.
 *
 * @description
 * Return the end of a second for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the end of a second
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The end of a second for 1 December 2014 22:15:45.400:
 * const result = endOfSecond(new Date(2014, 11, 1, 22, 15, 45, 400))
 * //=> Mon Dec 01 2014 22:15:45.999
 */

function endOfSecond(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setMilliseconds(999);
  return date;
}

var formatDistanceLocale = {
  lessThanXSeconds: {
    one: 'less than a second',
    other: 'less than {{count}} seconds'
  },
  xSeconds: {
    one: '1 second',
    other: '{{count}} seconds'
  },
  halfAMinute: 'half a minute',
  lessThanXMinutes: {
    one: 'less than a minute',
    other: 'less than {{count}} minutes'
  },
  xMinutes: {
    one: '1 minute',
    other: '{{count}} minutes'
  },
  aboutXHours: {
    one: 'about 1 hour',
    other: 'about {{count}} hours'
  },
  xHours: {
    one: '1 hour',
    other: '{{count}} hours'
  },
  xDays: {
    one: '1 day',
    other: '{{count}} days'
  },
  aboutXWeeks: {
    one: 'about 1 week',
    other: 'about {{count}} weeks'
  },
  xWeeks: {
    one: '1 week',
    other: '{{count}} weeks'
  },
  aboutXMonths: {
    one: 'about 1 month',
    other: 'about {{count}} months'
  },
  xMonths: {
    one: '1 month',
    other: '{{count}} months'
  },
  aboutXYears: {
    one: 'about 1 year',
    other: 'about {{count}} years'
  },
  xYears: {
    one: '1 year',
    other: '{{count}} years'
  },
  overXYears: {
    one: 'over 1 year',
    other: 'over {{count}} years'
  },
  almostXYears: {
    one: 'almost 1 year',
    other: 'almost {{count}} years'
  }
};
function formatDistance(token, count, options) {
  options = options || {};
  var result;

  if (typeof formatDistanceLocale[token] === 'string') {
    result = formatDistanceLocale[token];
  } else if (count === 1) {
    result = formatDistanceLocale[token].one;
  } else {
    result = formatDistanceLocale[token].other.replace('{{count}}', count);
  }

  if (options.addSuffix) {
    if (options.comparison > 0) {
      return 'in ' + result;
    } else {
      return result + ' ago';
    }
  }

  return result;
}

function buildFormatLongFn(args) {
  return function (dirtyOptions) {
    var options = dirtyOptions || {};
    var width = options.width ? String(options.width) : args.defaultWidth;
    var format = args.formats[width] || args.formats[args.defaultWidth];
    return format;
  };
}

var dateFormats = {
  full: 'EEEE, MMMM do, y',
  long: 'MMMM do, y',
  medium: 'MMM d, y',
  short: 'MM/dd/yyyy'
};
var timeFormats = {
  full: 'h:mm:ss a zzzz',
  long: 'h:mm:ss a z',
  medium: 'h:mm:ss a',
  short: 'h:mm a'
};
var dateTimeFormats = {
  full: "{{date}} 'at' {{time}}",
  long: "{{date}} 'at' {{time}}",
  medium: '{{date}}, {{time}}',
  short: '{{date}}, {{time}}'
};
var formatLong = {
  date: buildFormatLongFn({
    formats: dateFormats,
    defaultWidth: 'full'
  }),
  time: buildFormatLongFn({
    formats: timeFormats,
    defaultWidth: 'full'
  }),
  dateTime: buildFormatLongFn({
    formats: dateTimeFormats,
    defaultWidth: 'full'
  })
};

var formatRelativeLocale = {
  lastWeek: "'last' eeee 'at' p",
  yesterday: "'yesterday at' p",
  today: "'today at' p",
  tomorrow: "'tomorrow at' p",
  nextWeek: "eeee 'at' p",
  other: 'P'
};
function formatRelative(token, _date, _baseDate, _options) {
  return formatRelativeLocale[token];
}

function buildLocalizeFn(args) {
  return function (dirtyIndex, dirtyOptions) {
    var options = dirtyOptions || {};
    var context = options.context ? String(options.context) : 'standalone';
    var valuesArray;

    if (context === 'formatting' && args.formattingValues) {
      var defaultWidth = args.defaultFormattingWidth || args.defaultWidth;
      var width = options.width ? String(options.width) : defaultWidth;
      valuesArray = args.formattingValues[width] || args.formattingValues[defaultWidth];
    } else {
      var _defaultWidth = args.defaultWidth;

      var _width = options.width ? String(options.width) : args.defaultWidth;

      valuesArray = args.values[_width] || args.values[_defaultWidth];
    }

    var index = args.argumentCallback ? args.argumentCallback(dirtyIndex) : dirtyIndex;
    return valuesArray[index];
  };
}

var eraValues = {
  narrow: ['B', 'A'],
  abbreviated: ['BC', 'AD'],
  wide: ['Before Christ', 'Anno Domini']
};
var quarterValues = {
  narrow: ['1', '2', '3', '4'],
  abbreviated: ['Q1', 'Q2', 'Q3', 'Q4'],
  wide: ['1st quarter', '2nd quarter', '3rd quarter', '4th quarter'] // Note: in English, the names of days of the week and months are capitalized.
  // If you are making a new locale based on this one, check if the same is true for the language you're working on.
  // Generally, formatted dates should look like they are in the middle of a sentence,
  // e.g. in Spanish language the weekdays and months should be in the lowercase.

};
var monthValues = {
  narrow: ['J', 'F', 'M', 'A', 'M', 'J', 'J', 'A', 'S', 'O', 'N', 'D'],
  abbreviated: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
  wide: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
};
var dayValues = {
  narrow: ['S', 'M', 'T', 'W', 'T', 'F', 'S'],
  short: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
  abbreviated: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
  wide: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
};
var dayPeriodValues = {
  narrow: {
    am: 'a',
    pm: 'p',
    midnight: 'mi',
    noon: 'n',
    morning: 'morning',
    afternoon: 'afternoon',
    evening: 'evening',
    night: 'night'
  },
  abbreviated: {
    am: 'AM',
    pm: 'PM',
    midnight: 'midnight',
    noon: 'noon',
    morning: 'morning',
    afternoon: 'afternoon',
    evening: 'evening',
    night: 'night'
  },
  wide: {
    am: 'a.m.',
    pm: 'p.m.',
    midnight: 'midnight',
    noon: 'noon',
    morning: 'morning',
    afternoon: 'afternoon',
    evening: 'evening',
    night: 'night'
  }
};
var formattingDayPeriodValues = {
  narrow: {
    am: 'a',
    pm: 'p',
    midnight: 'mi',
    noon: 'n',
    morning: 'in the morning',
    afternoon: 'in the afternoon',
    evening: 'in the evening',
    night: 'at night'
  },
  abbreviated: {
    am: 'AM',
    pm: 'PM',
    midnight: 'midnight',
    noon: 'noon',
    morning: 'in the morning',
    afternoon: 'in the afternoon',
    evening: 'in the evening',
    night: 'at night'
  },
  wide: {
    am: 'a.m.',
    pm: 'p.m.',
    midnight: 'midnight',
    noon: 'noon',
    morning: 'in the morning',
    afternoon: 'in the afternoon',
    evening: 'in the evening',
    night: 'at night'
  }
};

function ordinalNumber(dirtyNumber, _dirtyOptions) {
  var number = Number(dirtyNumber); // If ordinal numbers depend on context, for example,
  // if they are different for different grammatical genders,
  // use `options.unit`:
  //
  //   var options = dirtyOptions || {}
  //   var unit = String(options.unit)
  //
  // where `unit` can be 'year', 'quarter', 'month', 'week', 'date', 'dayOfYear',
  // 'day', 'hour', 'minute', 'second'

  var rem100 = number % 100;

  if (rem100 > 20 || rem100 < 10) {
    switch (rem100 % 10) {
      case 1:
        return number + 'st';

      case 2:
        return number + 'nd';

      case 3:
        return number + 'rd';
    }
  }

  return number + 'th';
}

var localize = {
  ordinalNumber: ordinalNumber,
  era: buildLocalizeFn({
    values: eraValues,
    defaultWidth: 'wide'
  }),
  quarter: buildLocalizeFn({
    values: quarterValues,
    defaultWidth: 'wide',
    argumentCallback: function (quarter) {
      return Number(quarter) - 1;
    }
  }),
  month: buildLocalizeFn({
    values: monthValues,
    defaultWidth: 'wide'
  }),
  day: buildLocalizeFn({
    values: dayValues,
    defaultWidth: 'wide'
  }),
  dayPeriod: buildLocalizeFn({
    values: dayPeriodValues,
    defaultWidth: 'wide',
    formattingValues: formattingDayPeriodValues,
    defaultFormattingWidth: 'wide'
  })
};

function buildMatchPatternFn(args) {
  return function (dirtyString, dirtyOptions) {
    var string = String(dirtyString);
    var options = dirtyOptions || {};
    var matchResult = string.match(args.matchPattern);

    if (!matchResult) {
      return null;
    }

    var matchedString = matchResult[0];
    var parseResult = string.match(args.parsePattern);

    if (!parseResult) {
      return null;
    }

    var value = args.valueCallback ? args.valueCallback(parseResult[0]) : parseResult[0];
    value = options.valueCallback ? options.valueCallback(value) : value;
    return {
      value: value,
      rest: string.slice(matchedString.length)
    };
  };
}

function buildMatchFn(args) {
  return function (dirtyString, dirtyOptions) {
    var string = String(dirtyString);
    var options = dirtyOptions || {};
    var width = options.width;
    var matchPattern = width && args.matchPatterns[width] || args.matchPatterns[args.defaultMatchWidth];
    var matchResult = string.match(matchPattern);

    if (!matchResult) {
      return null;
    }

    var matchedString = matchResult[0];
    var parsePatterns = width && args.parsePatterns[width] || args.parsePatterns[args.defaultParseWidth];
    var value;

    if (Object.prototype.toString.call(parsePatterns) === '[object Array]') {
      value = findIndex(parsePatterns, function (pattern) {
        return pattern.test(matchedString);
      });
    } else {
      value = findKey(parsePatterns, function (pattern) {
        return pattern.test(matchedString);
      });
    }

    value = args.valueCallback ? args.valueCallback(value) : value;
    value = options.valueCallback ? options.valueCallback(value) : value;
    return {
      value: value,
      rest: string.slice(matchedString.length)
    };
  };
}

function findKey(object, predicate) {
  for (var key in object) {
    if (object.hasOwnProperty(key) && predicate(object[key])) {
      return key;
    }
  }
}

function findIndex(array, predicate) {
  for (var key = 0; key < array.length; key++) {
    if (predicate(array[key])) {
      return key;
    }
  }
}

var matchOrdinalNumberPattern = /^(\d+)(th|st|nd|rd)?/i;
var parseOrdinalNumberPattern = /\d+/i;
var matchEraPatterns = {
  narrow: /^(b|a)/i,
  abbreviated: /^(b\.?\s?c\.?|b\.?\s?c\.?\s?e\.?|a\.?\s?d\.?|c\.?\s?e\.?)/i,
  wide: /^(before christ|before common era|anno domini|common era)/i
};
var parseEraPatterns = {
  any: [/^b/i, /^(a|c)/i]
};
var matchQuarterPatterns = {
  narrow: /^[1234]/i,
  abbreviated: /^q[1234]/i,
  wide: /^[1234](th|st|nd|rd)? quarter/i
};
var parseQuarterPatterns = {
  any: [/1/i, /2/i, /3/i, /4/i]
};
var matchMonthPatterns = {
  narrow: /^[jfmasond]/i,
  abbreviated: /^(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)/i,
  wide: /^(january|february|march|april|may|june|july|august|september|october|november|december)/i
};
var parseMonthPatterns = {
  narrow: [/^j/i, /^f/i, /^m/i, /^a/i, /^m/i, /^j/i, /^j/i, /^a/i, /^s/i, /^o/i, /^n/i, /^d/i],
  any: [/^ja/i, /^f/i, /^mar/i, /^ap/i, /^may/i, /^jun/i, /^jul/i, /^au/i, /^s/i, /^o/i, /^n/i, /^d/i]
};
var matchDayPatterns = {
  narrow: /^[smtwf]/i,
  short: /^(su|mo|tu|we|th|fr|sa)/i,
  abbreviated: /^(sun|mon|tue|wed|thu|fri|sat)/i,
  wide: /^(sunday|monday|tuesday|wednesday|thursday|friday|saturday)/i
};
var parseDayPatterns = {
  narrow: [/^s/i, /^m/i, /^t/i, /^w/i, /^t/i, /^f/i, /^s/i],
  any: [/^su/i, /^m/i, /^tu/i, /^w/i, /^th/i, /^f/i, /^sa/i]
};
var matchDayPeriodPatterns = {
  narrow: /^(a|p|mi|n|(in the|at) (morning|afternoon|evening|night))/i,
  any: /^([ap]\.?\s?m\.?|midnight|noon|(in the|at) (morning|afternoon|evening|night))/i
};
var parseDayPeriodPatterns = {
  any: {
    am: /^a/i,
    pm: /^p/i,
    midnight: /^mi/i,
    noon: /^no/i,
    morning: /morning/i,
    afternoon: /afternoon/i,
    evening: /evening/i,
    night: /night/i
  }
};
var match = {
  ordinalNumber: buildMatchPatternFn({
    matchPattern: matchOrdinalNumberPattern,
    parsePattern: parseOrdinalNumberPattern,
    valueCallback: function (value) {
      return parseInt(value, 10);
    }
  }),
  era: buildMatchFn({
    matchPatterns: matchEraPatterns,
    defaultMatchWidth: 'wide',
    parsePatterns: parseEraPatterns,
    defaultParseWidth: 'any'
  }),
  quarter: buildMatchFn({
    matchPatterns: matchQuarterPatterns,
    defaultMatchWidth: 'wide',
    parsePatterns: parseQuarterPatterns,
    defaultParseWidth: 'any',
    valueCallback: function (index) {
      return index + 1;
    }
  }),
  month: buildMatchFn({
    matchPatterns: matchMonthPatterns,
    defaultMatchWidth: 'wide',
    parsePatterns: parseMonthPatterns,
    defaultParseWidth: 'any'
  }),
  day: buildMatchFn({
    matchPatterns: matchDayPatterns,
    defaultMatchWidth: 'wide',
    parsePatterns: parseDayPatterns,
    defaultParseWidth: 'any'
  }),
  dayPeriod: buildMatchFn({
    matchPatterns: matchDayPeriodPatterns,
    defaultMatchWidth: 'any',
    parsePatterns: parseDayPeriodPatterns,
    defaultParseWidth: 'any'
  })
};

/**
 * @type {Locale}
 * @category Locales
 * @summary English locale (United States).
 * @language English
 * @iso-639-2 eng
 * @author Sasha Koss [@kossnocorp]{@link https://github.com/kossnocorp}
 * @author Lesha Koss [@leshakoss]{@link https://github.com/leshakoss}
 */

var locale = {
  code: 'en-US',
  formatDistance: formatDistance,
  formatLong: formatLong,
  formatRelative: formatRelative,
  localize: localize,
  match: match,
  options: {
    weekStartsOn: 0
    /* Sunday */
    ,
    firstWeekContainsDate: 1
  }
};

/**
 * @name subMilliseconds
 * @category Millisecond Helpers
 * @summary Subtract the specified number of milliseconds from the given date.
 *
 * @description
 * Subtract the specified number of milliseconds from the given date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the date to be changed
 * @param {Number} amount - the amount of milliseconds to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the milliseconds subtracted
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Subtract 750 milliseconds from 10 July 2014 12:45:30.000:
 * const result = subMilliseconds(new Date(2014, 6, 10, 12, 45, 30, 0), 750)
 * //=> Thu Jul 10 2014 12:45:29.250
 */

function subMilliseconds(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addMilliseconds(dirtyDate, -amount);
}

function addLeadingZeros(number, targetLength) {
  var sign = number < 0 ? '-' : '';
  var output = Math.abs(number).toString();

  while (output.length < targetLength) {
    output = '0' + output;
  }

  return sign + output;
}

/*
 * |     | Unit                           |     | Unit                           |
 * |-----|--------------------------------|-----|--------------------------------|
 * |  a  | AM, PM                         |  A* |                                |
 * |  d  | Day of month                   |  D  |                                |
 * |  h  | Hour [1-12]                    |  H  | Hour [0-23]                    |
 * |  m  | Minute                         |  M  | Month                          |
 * |  s  | Second                         |  S  | Fraction of second             |
 * |  y  | Year (abs)                     |  Y  |                                |
 *
 * Letters marked by * are not implemented but reserved by Unicode standard.
 */

var formatters$1 = {
  // Year
  y: function (date, token) {
    // From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_tokens
    // | Year     |     y | yy |   yyy |  yyyy | yyyyy |
    // |----------|-------|----|-------|-------|-------|
    // | AD 1     |     1 | 01 |   001 |  0001 | 00001 |
    // | AD 12    |    12 | 12 |   012 |  0012 | 00012 |
    // | AD 123   |   123 | 23 |   123 |  0123 | 00123 |
    // | AD 1234  |  1234 | 34 |  1234 |  1234 | 01234 |
    // | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 |
    var signedYear = date.getUTCFullYear(); // Returns 1 for 1 BC (which is year 0 in JavaScript)

    var year = signedYear > 0 ? signedYear : 1 - signedYear;
    return addLeadingZeros(token === 'yy' ? year % 100 : year, token.length);
  },
  // Month
  M: function (date, token) {
    var month = date.getUTCMonth();
    return token === 'M' ? String(month + 1) : addLeadingZeros(month + 1, 2);
  },
  // Day of the month
  d: function (date, token) {
    return addLeadingZeros(date.getUTCDate(), token.length);
  },
  // AM or PM
  a: function (date, token) {
    var dayPeriodEnumValue = date.getUTCHours() / 12 >= 1 ? 'pm' : 'am';

    switch (token) {
      case 'a':
      case 'aa':
        return dayPeriodEnumValue.toUpperCase();

      case 'aaa':
        return dayPeriodEnumValue;

      case 'aaaaa':
        return dayPeriodEnumValue[0];

      case 'aaaa':
      default:
        return dayPeriodEnumValue === 'am' ? 'a.m.' : 'p.m.';
    }
  },
  // Hour [1-12]
  h: function (date, token) {
    return addLeadingZeros(date.getUTCHours() % 12 || 12, token.length);
  },
  // Hour [0-23]
  H: function (date, token) {
    return addLeadingZeros(date.getUTCHours(), token.length);
  },
  // Minute
  m: function (date, token) {
    return addLeadingZeros(date.getUTCMinutes(), token.length);
  },
  // Second
  s: function (date, token) {
    return addLeadingZeros(date.getUTCSeconds(), token.length);
  },
  // Fraction of second
  S: function (date, token) {
    var numberOfDigits = token.length;
    var milliseconds = date.getUTCMilliseconds();
    var fractionalSeconds = Math.floor(milliseconds * Math.pow(10, numberOfDigits - 3));
    return addLeadingZeros(fractionalSeconds, token.length);
  }
};

var MILLISECONDS_IN_DAY = 86400000; // This function will be a part of public API when UTC function will be implemented.
// See issue: https://github.com/date-fns/date-fns/issues/376

function getUTCDayOfYear(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var timestamp = date.getTime();
  date.setUTCMonth(0, 1);
  date.setUTCHours(0, 0, 0, 0);
  var startOfYearTimestamp = date.getTime();
  var difference = timestamp - startOfYearTimestamp;
  return Math.floor(difference / MILLISECONDS_IN_DAY) + 1;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function startOfUTCISOWeek(dirtyDate) {
  requiredArgs(1, arguments);
  var weekStartsOn = 1;
  var date = toDate(dirtyDate);
  var day = date.getUTCDay();
  var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
  date.setUTCDate(date.getUTCDate() - diff);
  date.setUTCHours(0, 0, 0, 0);
  return date;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function getUTCISOWeekYear(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var year = date.getUTCFullYear();
  var fourthOfJanuaryOfNextYear = new Date(0);
  fourthOfJanuaryOfNextYear.setUTCFullYear(year + 1, 0, 4);
  fourthOfJanuaryOfNextYear.setUTCHours(0, 0, 0, 0);
  var startOfNextYear = startOfUTCISOWeek(fourthOfJanuaryOfNextYear);
  var fourthOfJanuaryOfThisYear = new Date(0);
  fourthOfJanuaryOfThisYear.setUTCFullYear(year, 0, 4);
  fourthOfJanuaryOfThisYear.setUTCHours(0, 0, 0, 0);
  var startOfThisYear = startOfUTCISOWeek(fourthOfJanuaryOfThisYear);

  if (date.getTime() >= startOfNextYear.getTime()) {
    return year + 1;
  } else if (date.getTime() >= startOfThisYear.getTime()) {
    return year;
  } else {
    return year - 1;
  }
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function startOfUTCISOWeekYear(dirtyDate) {
  requiredArgs(1, arguments);
  var year = getUTCISOWeekYear(dirtyDate);
  var fourthOfJanuary = new Date(0);
  fourthOfJanuary.setUTCFullYear(year, 0, 4);
  fourthOfJanuary.setUTCHours(0, 0, 0, 0);
  var date = startOfUTCISOWeek(fourthOfJanuary);
  return date;
}

var MILLISECONDS_IN_WEEK$1 = 604800000; // This function will be a part of public API when UTC function will be implemented.
// See issue: https://github.com/date-fns/date-fns/issues/376

function getUTCISOWeek(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var diff = startOfUTCISOWeek(date).getTime() - startOfUTCISOWeekYear(date).getTime(); // Round the number of days to the nearest integer
  // because the number of milliseconds in a week is not constant
  // (e.g. it's different in the week of the daylight saving time clock shift)

  return Math.round(diff / MILLISECONDS_IN_WEEK$1) + 1;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function startOfUTCWeek(dirtyDate, dirtyOptions) {
  requiredArgs(1, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  var date = toDate(dirtyDate);
  var day = date.getUTCDay();
  var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
  date.setUTCDate(date.getUTCDate() - diff);
  date.setUTCHours(0, 0, 0, 0);
  return date;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function getUTCWeekYear(dirtyDate, dirtyOptions) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate, dirtyOptions);
  var year = date.getUTCFullYear();
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
  var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
  var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate); // Test if weekStartsOn is between 1 and 7 _and_ is not NaN

  if (!(firstWeekContainsDate >= 1 && firstWeekContainsDate <= 7)) {
    throw new RangeError('firstWeekContainsDate must be between 1 and 7 inclusively');
  }

  var firstWeekOfNextYear = new Date(0);
  firstWeekOfNextYear.setUTCFullYear(year + 1, 0, firstWeekContainsDate);
  firstWeekOfNextYear.setUTCHours(0, 0, 0, 0);
  var startOfNextYear = startOfUTCWeek(firstWeekOfNextYear, dirtyOptions);
  var firstWeekOfThisYear = new Date(0);
  firstWeekOfThisYear.setUTCFullYear(year, 0, firstWeekContainsDate);
  firstWeekOfThisYear.setUTCHours(0, 0, 0, 0);
  var startOfThisYear = startOfUTCWeek(firstWeekOfThisYear, dirtyOptions);

  if (date.getTime() >= startOfNextYear.getTime()) {
    return year + 1;
  } else if (date.getTime() >= startOfThisYear.getTime()) {
    return year;
  } else {
    return year - 1;
  }
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function startOfUTCWeekYear(dirtyDate, dirtyOptions) {
  requiredArgs(1, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
  var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
  var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate);
  var year = getUTCWeekYear(dirtyDate, dirtyOptions);
  var firstWeek = new Date(0);
  firstWeek.setUTCFullYear(year, 0, firstWeekContainsDate);
  firstWeek.setUTCHours(0, 0, 0, 0);
  var date = startOfUTCWeek(firstWeek, dirtyOptions);
  return date;
}

var MILLISECONDS_IN_WEEK = 604800000; // This function will be a part of public API when UTC function will be implemented.
// See issue: https://github.com/date-fns/date-fns/issues/376

function getUTCWeek(dirtyDate, options) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var diff = startOfUTCWeek(date, options).getTime() - startOfUTCWeekYear(date, options).getTime(); // Round the number of days to the nearest integer
  // because the number of milliseconds in a week is not constant
  // (e.g. it's different in the week of the daylight saving time clock shift)

  return Math.round(diff / MILLISECONDS_IN_WEEK) + 1;
}

var dayPeriodEnum = {
  am: 'am',
  pm: 'pm',
  midnight: 'midnight',
  noon: 'noon',
  morning: 'morning',
  afternoon: 'afternoon',
  evening: 'evening',
  night: 'night'
  /*
   * |     | Unit                           |     | Unit                           |
   * |-----|--------------------------------|-----|--------------------------------|
   * |  a  | AM, PM                         |  A* | Milliseconds in day            |
   * |  b  | AM, PM, noon, midnight         |  B  | Flexible day period            |
   * |  c  | Stand-alone local day of week  |  C* | Localized hour w/ day period   |
   * |  d  | Day of month                   |  D  | Day of year                    |
   * |  e  | Local day of week              |  E  | Day of week                    |
   * |  f  |                                |  F* | Day of week in month           |
   * |  g* | Modified Julian day            |  G  | Era                            |
   * |  h  | Hour [1-12]                    |  H  | Hour [0-23]                    |
   * |  i! | ISO day of week                |  I! | ISO week of year               |
   * |  j* | Localized hour w/ day period   |  J* | Localized hour w/o day period  |
   * |  k  | Hour [1-24]                    |  K  | Hour [0-11]                    |
   * |  l* | (deprecated)                   |  L  | Stand-alone month              |
   * |  m  | Minute                         |  M  | Month                          |
   * |  n  |                                |  N  |                                |
   * |  o! | Ordinal number modifier        |  O  | Timezone (GMT)                 |
   * |  p! | Long localized time            |  P! | Long localized date            |
   * |  q  | Stand-alone quarter            |  Q  | Quarter                        |
   * |  r* | Related Gregorian year         |  R! | ISO week-numbering year        |
   * |  s  | Second                         |  S  | Fraction of second             |
   * |  t! | Seconds timestamp              |  T! | Milliseconds timestamp         |
   * |  u  | Extended year                  |  U* | Cyclic year                    |
   * |  v* | Timezone (generic non-locat.)  |  V* | Timezone (location)            |
   * |  w  | Local week of year             |  W* | Week of month                  |
   * |  x  | Timezone (ISO-8601 w/o Z)      |  X  | Timezone (ISO-8601)            |
   * |  y  | Year (abs)                     |  Y  | Local week-numbering year      |
   * |  z  | Timezone (specific non-locat.) |  Z* | Timezone (aliases)             |
   *
   * Letters marked by * are not implemented but reserved by Unicode standard.
   *
   * Letters marked by ! are non-standard, but implemented by date-fns:
   * - `o` modifies the previous token to turn it into an ordinal (see `format` docs)
   * - `i` is ISO day of week. For `i` and `ii` is returns numeric ISO week days,
   *   i.e. 7 for Sunday, 1 for Monday, etc.
   * - `I` is ISO week of year, as opposed to `w` which is local week of year.
   * - `R` is ISO week-numbering year, as opposed to `Y` which is local week-numbering year.
   *   `R` is supposed to be used in conjunction with `I` and `i`
   *   for universal ISO week-numbering date, whereas
   *   `Y` is supposed to be used in conjunction with `w` and `e`
   *   for week-numbering date specific to the locale.
   * - `P` is long localized date format
   * - `p` is long localized time format
   */

};
var formatters = {
  // Era
  G: function (date, token, localize) {
    var era = date.getUTCFullYear() > 0 ? 1 : 0;

    switch (token) {
      // AD, BC
      case 'G':
      case 'GG':
      case 'GGG':
        return localize.era(era, {
          width: 'abbreviated'
        });
      // A, B

      case 'GGGGG':
        return localize.era(era, {
          width: 'narrow'
        });
      // Anno Domini, Before Christ

      case 'GGGG':
      default:
        return localize.era(era, {
          width: 'wide'
        });
    }
  },
  // Year
  y: function (date, token, localize) {
    // Ordinal number
    if (token === 'yo') {
      var signedYear = date.getUTCFullYear(); // Returns 1 for 1 BC (which is year 0 in JavaScript)

      var year = signedYear > 0 ? signedYear : 1 - signedYear;
      return localize.ordinalNumber(year, {
        unit: 'year'
      });
    }

    return formatters$1.y(date, token);
  },
  // Local week-numbering year
  Y: function (date, token, localize, options) {
    var signedWeekYear = getUTCWeekYear(date, options); // Returns 1 for 1 BC (which is year 0 in JavaScript)

    var weekYear = signedWeekYear > 0 ? signedWeekYear : 1 - signedWeekYear; // Two digit year

    if (token === 'YY') {
      var twoDigitYear = weekYear % 100;
      return addLeadingZeros(twoDigitYear, 2);
    } // Ordinal number


    if (token === 'Yo') {
      return localize.ordinalNumber(weekYear, {
        unit: 'year'
      });
    } // Padding


    return addLeadingZeros(weekYear, token.length);
  },
  // ISO week-numbering year
  R: function (date, token) {
    var isoWeekYear = getUTCISOWeekYear(date); // Padding

    return addLeadingZeros(isoWeekYear, token.length);
  },
  // Extended year. This is a single number designating the year of this calendar system.
  // The main difference between `y` and `u` localizers are B.C. years:
  // | Year | `y` | `u` |
  // |------|-----|-----|
  // | AC 1 |   1 |   1 |
  // | BC 1 |   1 |   0 |
  // | BC 2 |   2 |  -1 |
  // Also `yy` always returns the last two digits of a year,
  // while `uu` pads single digit years to 2 characters and returns other years unchanged.
  u: function (date, token) {
    var year = date.getUTCFullYear();
    return addLeadingZeros(year, token.length);
  },
  // Quarter
  Q: function (date, token, localize) {
    var quarter = Math.ceil((date.getUTCMonth() + 1) / 3);

    switch (token) {
      // 1, 2, 3, 4
      case 'Q':
        return String(quarter);
      // 01, 02, 03, 04

      case 'QQ':
        return addLeadingZeros(quarter, 2);
      // 1st, 2nd, 3rd, 4th

      case 'Qo':
        return localize.ordinalNumber(quarter, {
          unit: 'quarter'
        });
      // Q1, Q2, Q3, Q4

      case 'QQQ':
        return localize.quarter(quarter, {
          width: 'abbreviated',
          context: 'formatting'
        });
      // 1, 2, 3, 4 (narrow quarter; could be not numerical)

      case 'QQQQQ':
        return localize.quarter(quarter, {
          width: 'narrow',
          context: 'formatting'
        });
      // 1st quarter, 2nd quarter, ...

      case 'QQQQ':
      default:
        return localize.quarter(quarter, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // Stand-alone quarter
  q: function (date, token, localize) {
    var quarter = Math.ceil((date.getUTCMonth() + 1) / 3);

    switch (token) {
      // 1, 2, 3, 4
      case 'q':
        return String(quarter);
      // 01, 02, 03, 04

      case 'qq':
        return addLeadingZeros(quarter, 2);
      // 1st, 2nd, 3rd, 4th

      case 'qo':
        return localize.ordinalNumber(quarter, {
          unit: 'quarter'
        });
      // Q1, Q2, Q3, Q4

      case 'qqq':
        return localize.quarter(quarter, {
          width: 'abbreviated',
          context: 'standalone'
        });
      // 1, 2, 3, 4 (narrow quarter; could be not numerical)

      case 'qqqqq':
        return localize.quarter(quarter, {
          width: 'narrow',
          context: 'standalone'
        });
      // 1st quarter, 2nd quarter, ...

      case 'qqqq':
      default:
        return localize.quarter(quarter, {
          width: 'wide',
          context: 'standalone'
        });
    }
  },
  // Month
  M: function (date, token, localize) {
    var month = date.getUTCMonth();

    switch (token) {
      case 'M':
      case 'MM':
        return formatters$1.M(date, token);
      // 1st, 2nd, ..., 12th

      case 'Mo':
        return localize.ordinalNumber(month + 1, {
          unit: 'month'
        });
      // Jan, Feb, ..., Dec

      case 'MMM':
        return localize.month(month, {
          width: 'abbreviated',
          context: 'formatting'
        });
      // J, F, ..., D

      case 'MMMMM':
        return localize.month(month, {
          width: 'narrow',
          context: 'formatting'
        });
      // January, February, ..., December

      case 'MMMM':
      default:
        return localize.month(month, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // Stand-alone month
  L: function (date, token, localize) {
    var month = date.getUTCMonth();

    switch (token) {
      // 1, 2, ..., 12
      case 'L':
        return String(month + 1);
      // 01, 02, ..., 12

      case 'LL':
        return addLeadingZeros(month + 1, 2);
      // 1st, 2nd, ..., 12th

      case 'Lo':
        return localize.ordinalNumber(month + 1, {
          unit: 'month'
        });
      // Jan, Feb, ..., Dec

      case 'LLL':
        return localize.month(month, {
          width: 'abbreviated',
          context: 'standalone'
        });
      // J, F, ..., D

      case 'LLLLL':
        return localize.month(month, {
          width: 'narrow',
          context: 'standalone'
        });
      // January, February, ..., December

      case 'LLLL':
      default:
        return localize.month(month, {
          width: 'wide',
          context: 'standalone'
        });
    }
  },
  // Local week of year
  w: function (date, token, localize, options) {
    var week = getUTCWeek(date, options);

    if (token === 'wo') {
      return localize.ordinalNumber(week, {
        unit: 'week'
      });
    }

    return addLeadingZeros(week, token.length);
  },
  // ISO week of year
  I: function (date, token, localize) {
    var isoWeek = getUTCISOWeek(date);

    if (token === 'Io') {
      return localize.ordinalNumber(isoWeek, {
        unit: 'week'
      });
    }

    return addLeadingZeros(isoWeek, token.length);
  },
  // Day of the month
  d: function (date, token, localize) {
    if (token === 'do') {
      return localize.ordinalNumber(date.getUTCDate(), {
        unit: 'date'
      });
    }

    return formatters$1.d(date, token);
  },
  // Day of year
  D: function (date, token, localize) {
    var dayOfYear = getUTCDayOfYear(date);

    if (token === 'Do') {
      return localize.ordinalNumber(dayOfYear, {
        unit: 'dayOfYear'
      });
    }

    return addLeadingZeros(dayOfYear, token.length);
  },
  // Day of week
  E: function (date, token, localize) {
    var dayOfWeek = date.getUTCDay();

    switch (token) {
      // Tue
      case 'E':
      case 'EE':
      case 'EEE':
        return localize.day(dayOfWeek, {
          width: 'abbreviated',
          context: 'formatting'
        });
      // T

      case 'EEEEE':
        return localize.day(dayOfWeek, {
          width: 'narrow',
          context: 'formatting'
        });
      // Tu

      case 'EEEEEE':
        return localize.day(dayOfWeek, {
          width: 'short',
          context: 'formatting'
        });
      // Tuesday

      case 'EEEE':
      default:
        return localize.day(dayOfWeek, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // Local day of week
  e: function (date, token, localize, options) {
    var dayOfWeek = date.getUTCDay();
    var localDayOfWeek = (dayOfWeek - options.weekStartsOn + 8) % 7 || 7;

    switch (token) {
      // Numerical value (Nth day of week with current locale or weekStartsOn)
      case 'e':
        return String(localDayOfWeek);
      // Padded numerical value

      case 'ee':
        return addLeadingZeros(localDayOfWeek, 2);
      // 1st, 2nd, ..., 7th

      case 'eo':
        return localize.ordinalNumber(localDayOfWeek, {
          unit: 'day'
        });

      case 'eee':
        return localize.day(dayOfWeek, {
          width: 'abbreviated',
          context: 'formatting'
        });
      // T

      case 'eeeee':
        return localize.day(dayOfWeek, {
          width: 'narrow',
          context: 'formatting'
        });
      // Tu

      case 'eeeeee':
        return localize.day(dayOfWeek, {
          width: 'short',
          context: 'formatting'
        });
      // Tuesday

      case 'eeee':
      default:
        return localize.day(dayOfWeek, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // Stand-alone local day of week
  c: function (date, token, localize, options) {
    var dayOfWeek = date.getUTCDay();
    var localDayOfWeek = (dayOfWeek - options.weekStartsOn + 8) % 7 || 7;

    switch (token) {
      // Numerical value (same as in `e`)
      case 'c':
        return String(localDayOfWeek);
      // Padded numerical value

      case 'cc':
        return addLeadingZeros(localDayOfWeek, token.length);
      // 1st, 2nd, ..., 7th

      case 'co':
        return localize.ordinalNumber(localDayOfWeek, {
          unit: 'day'
        });

      case 'ccc':
        return localize.day(dayOfWeek, {
          width: 'abbreviated',
          context: 'standalone'
        });
      // T

      case 'ccccc':
        return localize.day(dayOfWeek, {
          width: 'narrow',
          context: 'standalone'
        });
      // Tu

      case 'cccccc':
        return localize.day(dayOfWeek, {
          width: 'short',
          context: 'standalone'
        });
      // Tuesday

      case 'cccc':
      default:
        return localize.day(dayOfWeek, {
          width: 'wide',
          context: 'standalone'
        });
    }
  },
  // ISO day of week
  i: function (date, token, localize) {
    var dayOfWeek = date.getUTCDay();
    var isoDayOfWeek = dayOfWeek === 0 ? 7 : dayOfWeek;

    switch (token) {
      // 2
      case 'i':
        return String(isoDayOfWeek);
      // 02

      case 'ii':
        return addLeadingZeros(isoDayOfWeek, token.length);
      // 2nd

      case 'io':
        return localize.ordinalNumber(isoDayOfWeek, {
          unit: 'day'
        });
      // Tue

      case 'iii':
        return localize.day(dayOfWeek, {
          width: 'abbreviated',
          context: 'formatting'
        });
      // T

      case 'iiiii':
        return localize.day(dayOfWeek, {
          width: 'narrow',
          context: 'formatting'
        });
      // Tu

      case 'iiiiii':
        return localize.day(dayOfWeek, {
          width: 'short',
          context: 'formatting'
        });
      // Tuesday

      case 'iiii':
      default:
        return localize.day(dayOfWeek, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // AM or PM
  a: function (date, token, localize) {
    var hours = date.getUTCHours();
    var dayPeriodEnumValue = hours / 12 >= 1 ? 'pm' : 'am';

    switch (token) {
      case 'a':
      case 'aa':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'abbreviated',
          context: 'formatting'
        });

      case 'aaa':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'abbreviated',
          context: 'formatting'
        }).toLowerCase();

      case 'aaaaa':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'narrow',
          context: 'formatting'
        });

      case 'aaaa':
      default:
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // AM, PM, midnight, noon
  b: function (date, token, localize) {
    var hours = date.getUTCHours();
    var dayPeriodEnumValue;

    if (hours === 12) {
      dayPeriodEnumValue = dayPeriodEnum.noon;
    } else if (hours === 0) {
      dayPeriodEnumValue = dayPeriodEnum.midnight;
    } else {
      dayPeriodEnumValue = hours / 12 >= 1 ? 'pm' : 'am';
    }

    switch (token) {
      case 'b':
      case 'bb':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'abbreviated',
          context: 'formatting'
        });

      case 'bbb':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'abbreviated',
          context: 'formatting'
        }).toLowerCase();

      case 'bbbbb':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'narrow',
          context: 'formatting'
        });

      case 'bbbb':
      default:
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // in the morning, in the afternoon, in the evening, at night
  B: function (date, token, localize) {
    var hours = date.getUTCHours();
    var dayPeriodEnumValue;

    if (hours >= 17) {
      dayPeriodEnumValue = dayPeriodEnum.evening;
    } else if (hours >= 12) {
      dayPeriodEnumValue = dayPeriodEnum.afternoon;
    } else if (hours >= 4) {
      dayPeriodEnumValue = dayPeriodEnum.morning;
    } else {
      dayPeriodEnumValue = dayPeriodEnum.night;
    }

    switch (token) {
      case 'B':
      case 'BB':
      case 'BBB':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'abbreviated',
          context: 'formatting'
        });

      case 'BBBBB':
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'narrow',
          context: 'formatting'
        });

      case 'BBBB':
      default:
        return localize.dayPeriod(dayPeriodEnumValue, {
          width: 'wide',
          context: 'formatting'
        });
    }
  },
  // Hour [1-12]
  h: function (date, token, localize) {
    if (token === 'ho') {
      var hours = date.getUTCHours() % 12;
      if (hours === 0) hours = 12;
      return localize.ordinalNumber(hours, {
        unit: 'hour'
      });
    }

    return formatters$1.h(date, token);
  },
  // Hour [0-23]
  H: function (date, token, localize) {
    if (token === 'Ho') {
      return localize.ordinalNumber(date.getUTCHours(), {
        unit: 'hour'
      });
    }

    return formatters$1.H(date, token);
  },
  // Hour [0-11]
  K: function (date, token, localize) {
    var hours = date.getUTCHours() % 12;

    if (token === 'Ko') {
      return localize.ordinalNumber(hours, {
        unit: 'hour'
      });
    }

    return addLeadingZeros(hours, token.length);
  },
  // Hour [1-24]
  k: function (date, token, localize) {
    var hours = date.getUTCHours();
    if (hours === 0) hours = 24;

    if (token === 'ko') {
      return localize.ordinalNumber(hours, {
        unit: 'hour'
      });
    }

    return addLeadingZeros(hours, token.length);
  },
  // Minute
  m: function (date, token, localize) {
    if (token === 'mo') {
      return localize.ordinalNumber(date.getUTCMinutes(), {
        unit: 'minute'
      });
    }

    return formatters$1.m(date, token);
  },
  // Second
  s: function (date, token, localize) {
    if (token === 'so') {
      return localize.ordinalNumber(date.getUTCSeconds(), {
        unit: 'second'
      });
    }

    return formatters$1.s(date, token);
  },
  // Fraction of second
  S: function (date, token) {
    return formatters$1.S(date, token);
  },
  // Timezone (ISO-8601. If offset is 0, output is always `'Z'`)
  X: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timezoneOffset = originalDate.getTimezoneOffset();

    if (timezoneOffset === 0) {
      return 'Z';
    }

    switch (token) {
      // Hours and optional minutes
      case 'X':
        return formatTimezoneWithOptionalMinutes(timezoneOffset);
      // Hours, minutes and optional seconds without `:` delimiter
      // Note: neither ISO-8601 nor JavaScript supports seconds in timezone offsets
      // so this token always has the same output as `XX`

      case 'XXXX':
      case 'XX':
        // Hours and minutes without `:` delimiter
        return formatTimezone(timezoneOffset);
      // Hours, minutes and optional seconds with `:` delimiter
      // Note: neither ISO-8601 nor JavaScript supports seconds in timezone offsets
      // so this token always has the same output as `XXX`

      case 'XXXXX':
      case 'XXX': // Hours and minutes with `:` delimiter

      default:
        return formatTimezone(timezoneOffset, ':');
    }
  },
  // Timezone (ISO-8601. If offset is 0, output is `'+00:00'` or equivalent)
  x: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timezoneOffset = originalDate.getTimezoneOffset();

    switch (token) {
      // Hours and optional minutes
      case 'x':
        return formatTimezoneWithOptionalMinutes(timezoneOffset);
      // Hours, minutes and optional seconds without `:` delimiter
      // Note: neither ISO-8601 nor JavaScript supports seconds in timezone offsets
      // so this token always has the same output as `xx`

      case 'xxxx':
      case 'xx':
        // Hours and minutes without `:` delimiter
        return formatTimezone(timezoneOffset);
      // Hours, minutes and optional seconds with `:` delimiter
      // Note: neither ISO-8601 nor JavaScript supports seconds in timezone offsets
      // so this token always has the same output as `xxx`

      case 'xxxxx':
      case 'xxx': // Hours and minutes with `:` delimiter

      default:
        return formatTimezone(timezoneOffset, ':');
    }
  },
  // Timezone (GMT)
  O: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timezoneOffset = originalDate.getTimezoneOffset();

    switch (token) {
      // Short
      case 'O':
      case 'OO':
      case 'OOO':
        return 'GMT' + formatTimezoneShort(timezoneOffset, ':');
      // Long

      case 'OOOO':
      default:
        return 'GMT' + formatTimezone(timezoneOffset, ':');
    }
  },
  // Timezone (specific non-location)
  z: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timezoneOffset = originalDate.getTimezoneOffset();

    switch (token) {
      // Short
      case 'z':
      case 'zz':
      case 'zzz':
        return 'GMT' + formatTimezoneShort(timezoneOffset, ':');
      // Long

      case 'zzzz':
      default:
        return 'GMT' + formatTimezone(timezoneOffset, ':');
    }
  },
  // Seconds timestamp
  t: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timestamp = Math.floor(originalDate.getTime() / 1000);
    return addLeadingZeros(timestamp, token.length);
  },
  // Milliseconds timestamp
  T: function (date, token, _localize, options) {
    var originalDate = options._originalDate || date;
    var timestamp = originalDate.getTime();
    return addLeadingZeros(timestamp, token.length);
  }
};

function formatTimezoneShort(offset, dirtyDelimiter) {
  var sign = offset > 0 ? '-' : '+';
  var absOffset = Math.abs(offset);
  var hours = Math.floor(absOffset / 60);
  var minutes = absOffset % 60;

  if (minutes === 0) {
    return sign + String(hours);
  }

  var delimiter = dirtyDelimiter || '';
  return sign + String(hours) + delimiter + addLeadingZeros(minutes, 2);
}

function formatTimezoneWithOptionalMinutes(offset, dirtyDelimiter) {
  if (offset % 60 === 0) {
    var sign = offset > 0 ? '-' : '+';
    return sign + addLeadingZeros(Math.abs(offset) / 60, 2);
  }

  return formatTimezone(offset, dirtyDelimiter);
}

function formatTimezone(offset, dirtyDelimiter) {
  var delimiter = dirtyDelimiter || '';
  var sign = offset > 0 ? '-' : '+';
  var absOffset = Math.abs(offset);
  var hours = addLeadingZeros(Math.floor(absOffset / 60), 2);
  var minutes = addLeadingZeros(absOffset % 60, 2);
  return sign + hours + delimiter + minutes;
}

function dateLongFormatter(pattern, formatLong) {
  switch (pattern) {
    case 'P':
      return formatLong.date({
        width: 'short'
      });

    case 'PP':
      return formatLong.date({
        width: 'medium'
      });

    case 'PPP':
      return formatLong.date({
        width: 'long'
      });

    case 'PPPP':
    default:
      return formatLong.date({
        width: 'full'
      });
  }
}

function timeLongFormatter(pattern, formatLong) {
  switch (pattern) {
    case 'p':
      return formatLong.time({
        width: 'short'
      });

    case 'pp':
      return formatLong.time({
        width: 'medium'
      });

    case 'ppp':
      return formatLong.time({
        width: 'long'
      });

    case 'pppp':
    default:
      return formatLong.time({
        width: 'full'
      });
  }
}

function dateTimeLongFormatter(pattern, formatLong) {
  var matchResult = pattern.match(/(P+)(p+)?/);
  var datePattern = matchResult[1];
  var timePattern = matchResult[2];

  if (!timePattern) {
    return dateLongFormatter(pattern, formatLong);
  }

  var dateTimeFormat;

  switch (datePattern) {
    case 'P':
      dateTimeFormat = formatLong.dateTime({
        width: 'short'
      });
      break;

    case 'PP':
      dateTimeFormat = formatLong.dateTime({
        width: 'medium'
      });
      break;

    case 'PPP':
      dateTimeFormat = formatLong.dateTime({
        width: 'long'
      });
      break;

    case 'PPPP':
    default:
      dateTimeFormat = formatLong.dateTime({
        width: 'full'
      });
      break;
  }

  return dateTimeFormat.replace('{{date}}', dateLongFormatter(datePattern, formatLong)).replace('{{time}}', timeLongFormatter(timePattern, formatLong));
}

var longFormatters = {
  p: timeLongFormatter,
  P: dateTimeLongFormatter
};

var protectedDayOfYearTokens = ['D', 'DD'];
var protectedWeekYearTokens = ['YY', 'YYYY'];
function isProtectedDayOfYearToken(token) {
  return protectedDayOfYearTokens.indexOf(token) !== -1;
}
function isProtectedWeekYearToken(token) {
  return protectedWeekYearTokens.indexOf(token) !== -1;
}
function throwProtectedError(token, format, input) {
  if (token === 'YYYY') {
    throw new RangeError("Use `yyyy` instead of `YYYY` (in `".concat(format, "`) for formatting years to the input `").concat(input, "`; see: https://git.io/fxCyr"));
  } else if (token === 'YY') {
    throw new RangeError("Use `yy` instead of `YY` (in `".concat(format, "`) for formatting years to the input `").concat(input, "`; see: https://git.io/fxCyr"));
  } else if (token === 'D') {
    throw new RangeError("Use `d` instead of `D` (in `".concat(format, "`) for formatting days of the month to the input `").concat(input, "`; see: https://git.io/fxCyr"));
  } else if (token === 'DD') {
    throw new RangeError("Use `dd` instead of `DD` (in `".concat(format, "`) for formatting days of the month to the input `").concat(input, "`; see: https://git.io/fxCyr"));
  }
}

// - [yYQqMLwIdDecihHKkms]o matches any available ordinal number token
//   (one of the certain letters followed by `o`)
// - (\w)\1* matches any sequences of the same letter
// - '' matches two quote characters in a row
// - '(''|[^'])+('|$) matches anything surrounded by two quote characters ('),
//   except a single quote symbol, which ends the sequence.
//   Two quote characters do not end the sequence.
//   If there is no matching single quote
//   then the sequence will continue until the end of the string.
// - . matches any single character unmatched by previous parts of the RegExps

var formattingTokensRegExp$1 = /[yYQqMLwIdDecihHKkms]o|(\w)\1*|''|'(''|[^'])+('|$)|./g; // This RegExp catches symbols escaped by quotes, and also
// sequences of symbols P, p, and the combinations like `PPPPPPPppppp`

var longFormattingTokensRegExp$1 = /P+p+|P+|p+|''|'(''|[^'])+('|$)|./g;
var escapedStringRegExp$1 = /^'([^]*?)'?$/;
var doubleQuoteRegExp$1 = /''/g;
var unescapedLatinCharacterRegExp$1 = /[a-zA-Z]/;
/**
 * @name format
 * @category Common Helpers
 * @summary Format the date.
 *
 * @description
 * Return the formatted date string in the given format. The result may vary by locale.
 *
 * > ⚠️ Please note that the `format` tokens differ from Moment.js and other libraries.
 * > See: https://git.io/fxCyr
 *
 * The characters wrapped between two single quotes characters (') are escaped.
 * Two single quotes in a row, whether inside or outside a quoted sequence, represent a 'real' single quote.
 * (see the last example)
 *
 * Format of the string is based on Unicode Technical Standard #35:
 * https://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
 * with a few additions (see note 7 below the table).
 *
 * Accepted patterns:
 * | Unit                            | Pattern | Result examples                   | Notes |
 * |---------------------------------|---------|-----------------------------------|-------|
 * | Era                             | G..GGG  | AD, BC                            |       |
 * |                                 | GGGG    | Anno Domini, Before Christ        | 2     |
 * |                                 | GGGGG   | A, B                              |       |
 * | Calendar year                   | y       | 44, 1, 1900, 2017                 | 5     |
 * |                                 | yo      | 44th, 1st, 0th, 17th              | 5,7   |
 * |                                 | yy      | 44, 01, 00, 17                    | 5     |
 * |                                 | yyy     | 044, 001, 1900, 2017              | 5     |
 * |                                 | yyyy    | 0044, 0001, 1900, 2017            | 5     |
 * |                                 | yyyyy   | ...                               | 3,5   |
 * | Local week-numbering year       | Y       | 44, 1, 1900, 2017                 | 5     |
 * |                                 | Yo      | 44th, 1st, 1900th, 2017th         | 5,7   |
 * |                                 | YY      | 44, 01, 00, 17                    | 5,8   |
 * |                                 | YYY     | 044, 001, 1900, 2017              | 5     |
 * |                                 | YYYY    | 0044, 0001, 1900, 2017            | 5,8   |
 * |                                 | YYYYY   | ...                               | 3,5   |
 * | ISO week-numbering year         | R       | -43, 0, 1, 1900, 2017             | 5,7   |
 * |                                 | RR      | -43, 00, 01, 1900, 2017           | 5,7   |
 * |                                 | RRR     | -043, 000, 001, 1900, 2017        | 5,7   |
 * |                                 | RRRR    | -0043, 0000, 0001, 1900, 2017     | 5,7   |
 * |                                 | RRRRR   | ...                               | 3,5,7 |
 * | Extended year                   | u       | -43, 0, 1, 1900, 2017             | 5     |
 * |                                 | uu      | -43, 01, 1900, 2017               | 5     |
 * |                                 | uuu     | -043, 001, 1900, 2017             | 5     |
 * |                                 | uuuu    | -0043, 0001, 1900, 2017           | 5     |
 * |                                 | uuuuu   | ...                               | 3,5   |
 * | Quarter (formatting)            | Q       | 1, 2, 3, 4                        |       |
 * |                                 | Qo      | 1st, 2nd, 3rd, 4th                | 7     |
 * |                                 | QQ      | 01, 02, 03, 04                    |       |
 * |                                 | QQQ     | Q1, Q2, Q3, Q4                    |       |
 * |                                 | QQQQ    | 1st quarter, 2nd quarter, ...     | 2     |
 * |                                 | QQQQQ   | 1, 2, 3, 4                        | 4     |
 * | Quarter (stand-alone)           | q       | 1, 2, 3, 4                        |       |
 * |                                 | qo      | 1st, 2nd, 3rd, 4th                | 7     |
 * |                                 | qq      | 01, 02, 03, 04                    |       |
 * |                                 | qqq     | Q1, Q2, Q3, Q4                    |       |
 * |                                 | qqqq    | 1st quarter, 2nd quarter, ...     | 2     |
 * |                                 | qqqqq   | 1, 2, 3, 4                        | 4     |
 * | Month (formatting)              | M       | 1, 2, ..., 12                     |       |
 * |                                 | Mo      | 1st, 2nd, ..., 12th               | 7     |
 * |                                 | MM      | 01, 02, ..., 12                   |       |
 * |                                 | MMM     | Jan, Feb, ..., Dec                |       |
 * |                                 | MMMM    | January, February, ..., December  | 2     |
 * |                                 | MMMMM   | J, F, ..., D                      |       |
 * | Month (stand-alone)             | L       | 1, 2, ..., 12                     |       |
 * |                                 | Lo      | 1st, 2nd, ..., 12th               | 7     |
 * |                                 | LL      | 01, 02, ..., 12                   |       |
 * |                                 | LLL     | Jan, Feb, ..., Dec                |       |
 * |                                 | LLLL    | January, February, ..., December  | 2     |
 * |                                 | LLLLL   | J, F, ..., D                      |       |
 * | Local week of year              | w       | 1, 2, ..., 53                     |       |
 * |                                 | wo      | 1st, 2nd, ..., 53th               | 7     |
 * |                                 | ww      | 01, 02, ..., 53                   |       |
 * | ISO week of year                | I       | 1, 2, ..., 53                     | 7     |
 * |                                 | Io      | 1st, 2nd, ..., 53th               | 7     |
 * |                                 | II      | 01, 02, ..., 53                   | 7     |
 * | Day of month                    | d       | 1, 2, ..., 31                     |       |
 * |                                 | do      | 1st, 2nd, ..., 31st               | 7     |
 * |                                 | dd      | 01, 02, ..., 31                   |       |
 * | Day of year                     | D       | 1, 2, ..., 365, 366               | 9     |
 * |                                 | Do      | 1st, 2nd, ..., 365th, 366th       | 7     |
 * |                                 | DD      | 01, 02, ..., 365, 366             | 9     |
 * |                                 | DDD     | 001, 002, ..., 365, 366           |       |
 * |                                 | DDDD    | ...                               | 3     |
 * | Day of week (formatting)        | E..EEE  | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 | EEEE    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 | EEEEE   | M, T, W, T, F, S, S               |       |
 * |                                 | EEEEEE  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | ISO day of week (formatting)    | i       | 1, 2, 3, ..., 7                   | 7     |
 * |                                 | io      | 1st, 2nd, ..., 7th                | 7     |
 * |                                 | ii      | 01, 02, ..., 07                   | 7     |
 * |                                 | iii     | Mon, Tue, Wed, ..., Sun           | 7     |
 * |                                 | iiii    | Monday, Tuesday, ..., Sunday      | 2,7   |
 * |                                 | iiiii   | M, T, W, T, F, S, S               | 7     |
 * |                                 | iiiiii  | Mo, Tu, We, Th, Fr, Su, Sa        | 7     |
 * | Local day of week (formatting)  | e       | 2, 3, 4, ..., 1                   |       |
 * |                                 | eo      | 2nd, 3rd, ..., 1st                | 7     |
 * |                                 | ee      | 02, 03, ..., 01                   |       |
 * |                                 | eee     | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 | eeee    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 | eeeee   | M, T, W, T, F, S, S               |       |
 * |                                 | eeeeee  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | Local day of week (stand-alone) | c       | 2, 3, 4, ..., 1                   |       |
 * |                                 | co      | 2nd, 3rd, ..., 1st                | 7     |
 * |                                 | cc      | 02, 03, ..., 01                   |       |
 * |                                 | ccc     | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 | cccc    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 | ccccc   | M, T, W, T, F, S, S               |       |
 * |                                 | cccccc  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | AM, PM                          | a..aa   | AM, PM                            |       |
 * |                                 | aaa     | am, pm                            |       |
 * |                                 | aaaa    | a.m., p.m.                        | 2     |
 * |                                 | aaaaa   | a, p                              |       |
 * | AM, PM, noon, midnight          | b..bb   | AM, PM, noon, midnight            |       |
 * |                                 | bbb     | am, pm, noon, midnight            |       |
 * |                                 | bbbb    | a.m., p.m., noon, midnight        | 2     |
 * |                                 | bbbbb   | a, p, n, mi                       |       |
 * | Flexible day period             | B..BBB  | at night, in the morning, ...     |       |
 * |                                 | BBBB    | at night, in the morning, ...     | 2     |
 * |                                 | BBBBB   | at night, in the morning, ...     |       |
 * | Hour [1-12]                     | h       | 1, 2, ..., 11, 12                 |       |
 * |                                 | ho      | 1st, 2nd, ..., 11th, 12th         | 7     |
 * |                                 | hh      | 01, 02, ..., 11, 12               |       |
 * | Hour [0-23]                     | H       | 0, 1, 2, ..., 23                  |       |
 * |                                 | Ho      | 0th, 1st, 2nd, ..., 23rd          | 7     |
 * |                                 | HH      | 00, 01, 02, ..., 23               |       |
 * | Hour [0-11]                     | K       | 1, 2, ..., 11, 0                  |       |
 * |                                 | Ko      | 1st, 2nd, ..., 11th, 0th          | 7     |
 * |                                 | KK      | 01, 02, ..., 11, 00               |       |
 * | Hour [1-24]                     | k       | 24, 1, 2, ..., 23                 |       |
 * |                                 | ko      | 24th, 1st, 2nd, ..., 23rd         | 7     |
 * |                                 | kk      | 24, 01, 02, ..., 23               |       |
 * | Minute                          | m       | 0, 1, ..., 59                     |       |
 * |                                 | mo      | 0th, 1st, ..., 59th               | 7     |
 * |                                 | mm      | 00, 01, ..., 59                   |       |
 * | Second                          | s       | 0, 1, ..., 59                     |       |
 * |                                 | so      | 0th, 1st, ..., 59th               | 7     |
 * |                                 | ss      | 00, 01, ..., 59                   |       |
 * | Fraction of second              | S       | 0, 1, ..., 9                      |       |
 * |                                 | SS      | 00, 01, ..., 99                   |       |
 * |                                 | SSS     | 000, 0001, ..., 999               |       |
 * |                                 | SSSS    | ...                               | 3     |
 * | Timezone (ISO-8601 w/ Z)        | X       | -08, +0530, Z                     |       |
 * |                                 | XX      | -0800, +0530, Z                   |       |
 * |                                 | XXX     | -08:00, +05:30, Z                 |       |
 * |                                 | XXXX    | -0800, +0530, Z, +123456          | 2     |
 * |                                 | XXXXX   | -08:00, +05:30, Z, +12:34:56      |       |
 * | Timezone (ISO-8601 w/o Z)       | x       | -08, +0530, +00                   |       |
 * |                                 | xx      | -0800, +0530, +0000               |       |
 * |                                 | xxx     | -08:00, +05:30, +00:00            | 2     |
 * |                                 | xxxx    | -0800, +0530, +0000, +123456      |       |
 * |                                 | xxxxx   | -08:00, +05:30, +00:00, +12:34:56 |       |
 * | Timezone (GMT)                  | O...OOO | GMT-8, GMT+5:30, GMT+0            |       |
 * |                                 | OOOO    | GMT-08:00, GMT+05:30, GMT+00:00   | 2     |
 * | Timezone (specific non-locat.)  | z...zzz | GMT-8, GMT+5:30, GMT+0            | 6     |
 * |                                 | zzzz    | GMT-08:00, GMT+05:30, GMT+00:00   | 2,6   |
 * | Seconds timestamp               | t       | 512969520                         | 7     |
 * |                                 | tt      | ...                               | 3,7   |
 * | Milliseconds timestamp          | T       | 512969520900                      | 7     |
 * |                                 | TT      | ...                               | 3,7   |
 * | Long localized date             | P       | 04/29/1453                        | 7     |
 * |                                 | PP      | Apr 29, 1453                      | 7     |
 * |                                 | PPP     | April 29th, 1453                  | 7     |
 * |                                 | PPPP    | Friday, April 29th, 1453          | 2,7   |
 * | Long localized time             | p       | 12:00 AM                          | 7     |
 * |                                 | pp      | 12:00:00 AM                       | 7     |
 * |                                 | ppp     | 12:00:00 AM GMT+2                 | 7     |
 * |                                 | pppp    | 12:00:00 AM GMT+02:00             | 2,7   |
 * | Combination of date and time    | Pp      | 04/29/1453, 12:00 AM              | 7     |
 * |                                 | PPpp    | Apr 29, 1453, 12:00:00 AM         | 7     |
 * |                                 | PPPppp  | April 29th, 1453 at ...           | 7     |
 * |                                 | PPPPpppp| Friday, April 29th, 1453 at ...   | 2,7   |
 * Notes:
 * 1. "Formatting" units (e.g. formatting quarter) in the default en-US locale
 *    are the same as "stand-alone" units, but are different in some languages.
 *    "Formatting" units are declined according to the rules of the language
 *    in the context of a date. "Stand-alone" units are always nominative singular:
 *
 *    `format(new Date(2017, 10, 6), 'do LLLL', {locale: cs}) //=> '6. listopad'`
 *
 *    `format(new Date(2017, 10, 6), 'do MMMM', {locale: cs}) //=> '6. listopadu'`
 *
 * 2. Any sequence of the identical letters is a pattern, unless it is escaped by
 *    the single quote characters (see below).
 *    If the sequence is longer than listed in table (e.g. `EEEEEEEEEEE`)
 *    the output will be the same as default pattern for this unit, usually
 *    the longest one (in case of ISO weekdays, `EEEE`). Default patterns for units
 *    are marked with "2" in the last column of the table.
 *
 *    `format(new Date(2017, 10, 6), 'MMM') //=> 'Nov'`
 *
 *    `format(new Date(2017, 10, 6), 'MMMM') //=> 'November'`
 *
 *    `format(new Date(2017, 10, 6), 'MMMMM') //=> 'N'`
 *
 *    `format(new Date(2017, 10, 6), 'MMMMMM') //=> 'November'`
 *
 *    `format(new Date(2017, 10, 6), 'MMMMMMM') //=> 'November'`
 *
 * 3. Some patterns could be unlimited length (such as `yyyyyyyy`).
 *    The output will be padded with zeros to match the length of the pattern.
 *
 *    `format(new Date(2017, 10, 6), 'yyyyyyyy') //=> '00002017'`
 *
 * 4. `QQQQQ` and `qqqqq` could be not strictly numerical in some locales.
 *    These tokens represent the shortest form of the quarter.
 *
 * 5. The main difference between `y` and `u` patterns are B.C. years:
 *
 *    | Year | `y` | `u` |
 *    |------|-----|-----|
 *    | AC 1 |   1 |   1 |
 *    | BC 1 |   1 |   0 |
 *    | BC 2 |   2 |  -1 |
 *
 *    Also `yy` always returns the last two digits of a year,
 *    while `uu` pads single digit years to 2 characters and returns other years unchanged:
 *
 *    | Year | `yy` | `uu` |
 *    |------|------|------|
 *    | 1    |   01 |   01 |
 *    | 14   |   14 |   14 |
 *    | 376  |   76 |  376 |
 *    | 1453 |   53 | 1453 |
 *
 *    The same difference is true for local and ISO week-numbering years (`Y` and `R`),
 *    except local week-numbering years are dependent on `options.weekStartsOn`
 *    and `options.firstWeekContainsDate` (compare [getISOWeekYear]{@link https://date-fns.org/docs/getISOWeekYear}
 *    and [getWeekYear]{@link https://date-fns.org/docs/getWeekYear}).
 *
 * 6. Specific non-location timezones are currently unavailable in `date-fns`,
 *    so right now these tokens fall back to GMT timezones.
 *
 * 7. These patterns are not in the Unicode Technical Standard #35:
 *    - `i`: ISO day of week
 *    - `I`: ISO week of year
 *    - `R`: ISO week-numbering year
 *    - `t`: seconds timestamp
 *    - `T`: milliseconds timestamp
 *    - `o`: ordinal number modifier
 *    - `P`: long localized date
 *    - `p`: long localized time
 *
 * 8. `YY` and `YYYY` tokens represent week-numbering years but they are often confused with years.
 *    You should enable `options.useAdditionalWeekYearTokens` to use them. See: https://git.io/fxCyr
 *
 * 9. `D` and `DD` tokens represent days of the year but they are ofthen confused with days of the month.
 *    You should enable `options.useAdditionalDayOfYearTokens` to use them. See: https://git.io/fxCyr
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * - The second argument is now required for the sake of explicitness.
 *
 *   ```javascript
 *   // Before v2.0.0
 *   format(new Date(2016, 0, 1))
 *
 *   // v2.0.0 onward
 *   format(new Date(2016, 0, 1), "yyyy-MM-dd'T'HH:mm:ss.SSSxxx")
 *   ```
 *
 * - New format string API for `format` function
 *   which is based on [Unicode Technical Standard #35](https://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table).
 *   See [this post](https://blog.date-fns.org/post/unicode-tokens-in-date-fns-v2-sreatyki91jg) for more details.
 *
 * - Characters are now escaped using single quote symbols (`'`) instead of square brackets.
 *
 * @param {Date|Number} date - the original date
 * @param {String} format - the string of tokens
 * @param {Object} [options] - an object with options.
 * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
 * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
 * @param {Number} [options.firstWeekContainsDate=1] - the day of January, which is
 * @param {Boolean} [options.useAdditionalWeekYearTokens=false] - if true, allows usage of the week-numbering year tokens `YY` and `YYYY`;
 *   see: https://git.io/fxCyr
 * @param {Boolean} [options.useAdditionalDayOfYearTokens=false] - if true, allows usage of the day of year tokens `D` and `DD`;
 *   see: https://git.io/fxCyr
 * @returns {String} the formatted date string
 * @throws {TypeError} 2 arguments required
 * @throws {RangeError} `date` must not be Invalid Date
 * @throws {RangeError} `options.locale` must contain `localize` property
 * @throws {RangeError} `options.locale` must contain `formatLong` property
 * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
 * @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
 * @throws {RangeError} use `yyyy` instead of `YYYY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `yy` instead of `YY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `d` instead of `D` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `dd` instead of `DD` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} format string contains an unescaped latin alphabet character
 *
 * @example
 * // Represent 11 February 2014 in middle-endian format:
 * var result = format(new Date(2014, 1, 11), 'MM/dd/yyyy')
 * //=> '02/11/2014'
 *
 * @example
 * // Represent 2 July 2014 in Esperanto:
 * import { eoLocale } from 'date-fns/locale/eo'
 * var result = format(new Date(2014, 6, 2), "do 'de' MMMM yyyy", {
 *   locale: eoLocale
 * })
 * //=> '2-a de julio 2014'
 *
 * @example
 * // Escape string by single quote characters:
 * var result = format(new Date(2014, 6, 2, 15), "h 'o''clock'")
 * //=> "3 o'clock"
 */

function format(dirtyDate, dirtyFormatStr, dirtyOptions) {
  requiredArgs(2, arguments);
  var formatStr = String(dirtyFormatStr);
  var options = dirtyOptions || {};
  var locale$1 = options.locale || locale;
  var localeFirstWeekContainsDate = locale$1.options && locale$1.options.firstWeekContainsDate;
  var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
  var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate); // Test if weekStartsOn is between 1 and 7 _and_ is not NaN

  if (!(firstWeekContainsDate >= 1 && firstWeekContainsDate <= 7)) {
    throw new RangeError('firstWeekContainsDate must be between 1 and 7 inclusively');
  }

  var localeWeekStartsOn = locale$1.options && locale$1.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  if (!locale$1.localize) {
    throw new RangeError('locale must contain localize property');
  }

  if (!locale$1.formatLong) {
    throw new RangeError('locale must contain formatLong property');
  }

  var originalDate = toDate(dirtyDate);

  if (!isValid(originalDate)) {
    throw new RangeError('Invalid time value');
  } // Convert the date in system timezone to the same date in UTC+00:00 timezone.
  // This ensures that when UTC functions will be implemented, locales will be compatible with them.
  // See an issue about UTC functions: https://github.com/date-fns/date-fns/issues/376


  var timezoneOffset = getTimezoneOffsetInMilliseconds(originalDate);
  var utcDate = subMilliseconds(originalDate, timezoneOffset);
  var formatterOptions = {
    firstWeekContainsDate: firstWeekContainsDate,
    weekStartsOn: weekStartsOn,
    locale: locale$1,
    _originalDate: originalDate
  };
  var result = formatStr.match(longFormattingTokensRegExp$1).map(function (substring) {
    var firstCharacter = substring[0];

    if (firstCharacter === 'p' || firstCharacter === 'P') {
      var longFormatter = longFormatters[firstCharacter];
      return longFormatter(substring, locale$1.formatLong, formatterOptions);
    }

    return substring;
  }).join('').match(formattingTokensRegExp$1).map(function (substring) {
    // Replace two single quote characters with one single quote character
    if (substring === "''") {
      return "'";
    }

    var firstCharacter = substring[0];

    if (firstCharacter === "'") {
      return cleanEscapedString$1(substring);
    }

    var formatter = formatters[firstCharacter];

    if (formatter) {
      if (!options.useAdditionalWeekYearTokens && isProtectedWeekYearToken(substring)) {
        throwProtectedError(substring, dirtyFormatStr, dirtyDate);
      }

      if (!options.useAdditionalDayOfYearTokens && isProtectedDayOfYearToken(substring)) {
        throwProtectedError(substring, dirtyFormatStr, dirtyDate);
      }

      return formatter(utcDate, substring, locale$1.localize, formatterOptions);
    }

    if (firstCharacter.match(unescapedLatinCharacterRegExp$1)) {
      throw new RangeError('Format string contains an unescaped latin alphabet character `' + firstCharacter + '`');
    }

    return substring;
  }).join('');
  return result;
}

function cleanEscapedString$1(input) {
  return input.match(escapedStringRegExp$1)[1].replace(doubleQuoteRegExp$1, "'");
}

function assign(target, dirtyObject) {
  if (target == null) {
    throw new TypeError('assign requires that input parameter not be null or undefined');
  }

  dirtyObject = dirtyObject || {};

  for (var property in dirtyObject) {
    if (dirtyObject.hasOwnProperty(property)) {
      target[property] = dirtyObject[property];
    }
  }

  return target;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function setUTCDay(dirtyDate, dirtyDay, dirtyOptions) {
  requiredArgs(2, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  var date = toDate(dirtyDate);
  var day = toInteger(dirtyDay);
  var currentDay = date.getUTCDay();
  var remainder = day % 7;
  var dayIndex = (remainder + 7) % 7;
  var diff = (dayIndex < weekStartsOn ? 7 : 0) + day - currentDay;
  date.setUTCDate(date.getUTCDate() + diff);
  return date;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function setUTCISODay(dirtyDate, dirtyDay) {
  requiredArgs(2, arguments);
  var day = toInteger(dirtyDay);

  if (day % 7 === 0) {
    day = day - 7;
  }

  var weekStartsOn = 1;
  var date = toDate(dirtyDate);
  var currentDay = date.getUTCDay();
  var remainder = day % 7;
  var dayIndex = (remainder + 7) % 7;
  var diff = (dayIndex < weekStartsOn ? 7 : 0) + day - currentDay;
  date.setUTCDate(date.getUTCDate() + diff);
  return date;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function setUTCISOWeek(dirtyDate, dirtyISOWeek) {
  requiredArgs(2, arguments);
  var date = toDate(dirtyDate);
  var isoWeek = toInteger(dirtyISOWeek);
  var diff = getUTCISOWeek(date) - isoWeek;
  date.setUTCDate(date.getUTCDate() - diff * 7);
  return date;
}

// See issue: https://github.com/date-fns/date-fns/issues/376

function setUTCWeek(dirtyDate, dirtyWeek, options) {
  requiredArgs(2, arguments);
  var date = toDate(dirtyDate);
  var week = toInteger(dirtyWeek);
  var diff = getUTCWeek(date, options) - week;
  date.setUTCDate(date.getUTCDate() - diff * 7);
  return date;
}

var MILLISECONDS_IN_HOUR$1 = 3600000;
var MILLISECONDS_IN_MINUTE$1 = 60000;
var MILLISECONDS_IN_SECOND = 1000;
var numericPatterns = {
  month: /^(1[0-2]|0?\d)/,
  // 0 to 12
  date: /^(3[0-1]|[0-2]?\d)/,
  // 0 to 31
  dayOfYear: /^(36[0-6]|3[0-5]\d|[0-2]?\d?\d)/,
  // 0 to 366
  week: /^(5[0-3]|[0-4]?\d)/,
  // 0 to 53
  hour23h: /^(2[0-3]|[0-1]?\d)/,
  // 0 to 23
  hour24h: /^(2[0-4]|[0-1]?\d)/,
  // 0 to 24
  hour11h: /^(1[0-1]|0?\d)/,
  // 0 to 11
  hour12h: /^(1[0-2]|0?\d)/,
  // 0 to 12
  minute: /^[0-5]?\d/,
  // 0 to 59
  second: /^[0-5]?\d/,
  // 0 to 59
  singleDigit: /^\d/,
  // 0 to 9
  twoDigits: /^\d{1,2}/,
  // 0 to 99
  threeDigits: /^\d{1,3}/,
  // 0 to 999
  fourDigits: /^\d{1,4}/,
  // 0 to 9999
  anyDigitsSigned: /^-?\d+/,
  singleDigitSigned: /^-?\d/,
  // 0 to 9, -0 to -9
  twoDigitsSigned: /^-?\d{1,2}/,
  // 0 to 99, -0 to -99
  threeDigitsSigned: /^-?\d{1,3}/,
  // 0 to 999, -0 to -999
  fourDigitsSigned: /^-?\d{1,4}/ // 0 to 9999, -0 to -9999

};
var timezonePatterns = {
  basicOptionalMinutes: /^([+-])(\d{2})(\d{2})?|Z/,
  basic: /^([+-])(\d{2})(\d{2})|Z/,
  basicOptionalSeconds: /^([+-])(\d{2})(\d{2})((\d{2}))?|Z/,
  extended: /^([+-])(\d{2}):(\d{2})|Z/,
  extendedOptionalSeconds: /^([+-])(\d{2}):(\d{2})(:(\d{2}))?|Z/
};

function parseNumericPattern(pattern, string, valueCallback) {
  var matchResult = string.match(pattern);

  if (!matchResult) {
    return null;
  }

  var value = parseInt(matchResult[0], 10);
  return {
    value: valueCallback ? valueCallback(value) : value,
    rest: string.slice(matchResult[0].length)
  };
}

function parseTimezonePattern(pattern, string) {
  var matchResult = string.match(pattern);

  if (!matchResult) {
    return null;
  } // Input is 'Z'


  if (matchResult[0] === 'Z') {
    return {
      value: 0,
      rest: string.slice(1)
    };
  }

  var sign = matchResult[1] === '+' ? 1 : -1;
  var hours = matchResult[2] ? parseInt(matchResult[2], 10) : 0;
  var minutes = matchResult[3] ? parseInt(matchResult[3], 10) : 0;
  var seconds = matchResult[5] ? parseInt(matchResult[5], 10) : 0;
  return {
    value: sign * (hours * MILLISECONDS_IN_HOUR$1 + minutes * MILLISECONDS_IN_MINUTE$1 + seconds * MILLISECONDS_IN_SECOND),
    rest: string.slice(matchResult[0].length)
  };
}

function parseAnyDigitsSigned(string, valueCallback) {
  return parseNumericPattern(numericPatterns.anyDigitsSigned, string, valueCallback);
}

function parseNDigits(n, string, valueCallback) {
  switch (n) {
    case 1:
      return parseNumericPattern(numericPatterns.singleDigit, string, valueCallback);

    case 2:
      return parseNumericPattern(numericPatterns.twoDigits, string, valueCallback);

    case 3:
      return parseNumericPattern(numericPatterns.threeDigits, string, valueCallback);

    case 4:
      return parseNumericPattern(numericPatterns.fourDigits, string, valueCallback);

    default:
      return parseNumericPattern(new RegExp('^\\d{1,' + n + '}'), string, valueCallback);
  }
}

function parseNDigitsSigned(n, string, valueCallback) {
  switch (n) {
    case 1:
      return parseNumericPattern(numericPatterns.singleDigitSigned, string, valueCallback);

    case 2:
      return parseNumericPattern(numericPatterns.twoDigitsSigned, string, valueCallback);

    case 3:
      return parseNumericPattern(numericPatterns.threeDigitsSigned, string, valueCallback);

    case 4:
      return parseNumericPattern(numericPatterns.fourDigitsSigned, string, valueCallback);

    default:
      return parseNumericPattern(new RegExp('^-?\\d{1,' + n + '}'), string, valueCallback);
  }
}

function dayPeriodEnumToHours(enumValue) {
  switch (enumValue) {
    case 'morning':
      return 4;

    case 'evening':
      return 17;

    case 'pm':
    case 'noon':
    case 'afternoon':
      return 12;

    case 'am':
    case 'midnight':
    case 'night':
    default:
      return 0;
  }
}

function normalizeTwoDigitYear(twoDigitYear, currentYear) {
  var isCommonEra = currentYear > 0; // Absolute number of the current year:
  // 1 -> 1 AC
  // 0 -> 1 BC
  // -1 -> 2 BC

  var absCurrentYear = isCommonEra ? currentYear : 1 - currentYear;
  var result;

  if (absCurrentYear <= 50) {
    result = twoDigitYear || 100;
  } else {
    var rangeEnd = absCurrentYear + 50;
    var rangeEndCentury = Math.floor(rangeEnd / 100) * 100;
    var isPreviousCentury = twoDigitYear >= rangeEnd % 100;
    result = twoDigitYear + rangeEndCentury - (isPreviousCentury ? 100 : 0);
  }

  return isCommonEra ? result : 1 - result;
}

var DAYS_IN_MONTH = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
var DAYS_IN_MONTH_LEAP_YEAR = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; // User for validation

function isLeapYearIndex$1(year) {
  return year % 400 === 0 || year % 4 === 0 && year % 100 !== 0;
}
/*
 * |     | Unit                           |     | Unit                           |
 * |-----|--------------------------------|-----|--------------------------------|
 * |  a  | AM, PM                         |  A* | Milliseconds in day            |
 * |  b  | AM, PM, noon, midnight         |  B  | Flexible day period            |
 * |  c  | Stand-alone local day of week  |  C* | Localized hour w/ day period   |
 * |  d  | Day of month                   |  D  | Day of year                    |
 * |  e  | Local day of week              |  E  | Day of week                    |
 * |  f  |                                |  F* | Day of week in month           |
 * |  g* | Modified Julian day            |  G  | Era                            |
 * |  h  | Hour [1-12]                    |  H  | Hour [0-23]                    |
 * |  i! | ISO day of week                |  I! | ISO week of year               |
 * |  j* | Localized hour w/ day period   |  J* | Localized hour w/o day period  |
 * |  k  | Hour [1-24]                    |  K  | Hour [0-11]                    |
 * |  l* | (deprecated)                   |  L  | Stand-alone month              |
 * |  m  | Minute                         |  M  | Month                          |
 * |  n  |                                |  N  |                                |
 * |  o! | Ordinal number modifier        |  O* | Timezone (GMT)                 |
 * |  p  |                                |  P  |                                |
 * |  q  | Stand-alone quarter            |  Q  | Quarter                        |
 * |  r* | Related Gregorian year         |  R! | ISO week-numbering year        |
 * |  s  | Second                         |  S  | Fraction of second             |
 * |  t! | Seconds timestamp              |  T! | Milliseconds timestamp         |
 * |  u  | Extended year                  |  U* | Cyclic year                    |
 * |  v* | Timezone (generic non-locat.)  |  V* | Timezone (location)            |
 * |  w  | Local week of year             |  W* | Week of month                  |
 * |  x  | Timezone (ISO-8601 w/o Z)      |  X  | Timezone (ISO-8601)            |
 * |  y  | Year (abs)                     |  Y  | Local week-numbering year      |
 * |  z* | Timezone (specific non-locat.) |  Z* | Timezone (aliases)             |
 *
 * Letters marked by * are not implemented but reserved by Unicode standard.
 *
 * Letters marked by ! are non-standard, but implemented by date-fns:
 * - `o` modifies the previous token to turn it into an ordinal (see `parse` docs)
 * - `i` is ISO day of week. For `i` and `ii` is returns numeric ISO week days,
 *   i.e. 7 for Sunday, 1 for Monday, etc.
 * - `I` is ISO week of year, as opposed to `w` which is local week of year.
 * - `R` is ISO week-numbering year, as opposed to `Y` which is local week-numbering year.
 *   `R` is supposed to be used in conjunction with `I` and `i`
 *   for universal ISO week-numbering date, whereas
 *   `Y` is supposed to be used in conjunction with `w` and `e`
 *   for week-numbering date specific to the locale.
 */


var parsers = {
  // Era
  G: {
    priority: 140,
    parse: function (string, token, match, _options) {
      switch (token) {
        // AD, BC
        case 'G':
        case 'GG':
        case 'GGG':
          return match.era(string, {
            width: 'abbreviated'
          }) || match.era(string, {
            width: 'narrow'
          });
        // A, B

        case 'GGGGG':
          return match.era(string, {
            width: 'narrow'
          });
        // Anno Domini, Before Christ

        case 'GGGG':
        default:
          return match.era(string, {
            width: 'wide'
          }) || match.era(string, {
            width: 'abbreviated'
          }) || match.era(string, {
            width: 'narrow'
          });
      }
    },
    set: function (date, flags, value, _options) {
      flags.era = value;
      date.setUTCFullYear(value, 0, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['R', 'u', 't', 'T']
  },
  // Year
  y: {
    // From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns
    // | Year     |     y | yy |   yyy |  yyyy | yyyyy |
    // |----------|-------|----|-------|-------|-------|
    // | AD 1     |     1 | 01 |   001 |  0001 | 00001 |
    // | AD 12    |    12 | 12 |   012 |  0012 | 00012 |
    // | AD 123   |   123 | 23 |   123 |  0123 | 00123 |
    // | AD 1234  |  1234 | 34 |  1234 |  1234 | 01234 |
    // | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 |
    priority: 130,
    parse: function (string, token, match, _options) {
      var valueCallback = function (year) {
        return {
          year: year,
          isTwoDigitYear: token === 'yy'
        };
      };

      switch (token) {
        case 'y':
          return parseNDigits(4, string, valueCallback);

        case 'yo':
          return match.ordinalNumber(string, {
            unit: 'year',
            valueCallback: valueCallback
          });

        default:
          return parseNDigits(token.length, string, valueCallback);
      }
    },
    validate: function (_date, value, _options) {
      return value.isTwoDigitYear || value.year > 0;
    },
    set: function (date, flags, value, _options) {
      var currentYear = date.getUTCFullYear();

      if (value.isTwoDigitYear) {
        var normalizedTwoDigitYear = normalizeTwoDigitYear(value.year, currentYear);
        date.setUTCFullYear(normalizedTwoDigitYear, 0, 1);
        date.setUTCHours(0, 0, 0, 0);
        return date;
      }

      var year = !('era' in flags) || flags.era === 1 ? value.year : 1 - value.year;
      date.setUTCFullYear(year, 0, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'u', 'w', 'I', 'i', 'e', 'c', 't', 'T']
  },
  // Local week-numbering year
  Y: {
    priority: 130,
    parse: function (string, token, match, _options) {
      var valueCallback = function (year) {
        return {
          year: year,
          isTwoDigitYear: token === 'YY'
        };
      };

      switch (token) {
        case 'Y':
          return parseNDigits(4, string, valueCallback);

        case 'Yo':
          return match.ordinalNumber(string, {
            unit: 'year',
            valueCallback: valueCallback
          });

        default:
          return parseNDigits(token.length, string, valueCallback);
      }
    },
    validate: function (_date, value, _options) {
      return value.isTwoDigitYear || value.year > 0;
    },
    set: function (date, flags, value, options) {
      var currentYear = getUTCWeekYear(date, options);

      if (value.isTwoDigitYear) {
        var normalizedTwoDigitYear = normalizeTwoDigitYear(value.year, currentYear);
        date.setUTCFullYear(normalizedTwoDigitYear, 0, options.firstWeekContainsDate);
        date.setUTCHours(0, 0, 0, 0);
        return startOfUTCWeek(date, options);
      }

      var year = !('era' in flags) || flags.era === 1 ? value.year : 1 - value.year;
      date.setUTCFullYear(year, 0, options.firstWeekContainsDate);
      date.setUTCHours(0, 0, 0, 0);
      return startOfUTCWeek(date, options);
    },
    incompatibleTokens: ['y', 'R', 'u', 'Q', 'q', 'M', 'L', 'I', 'd', 'D', 'i', 't', 'T']
  },
  // ISO week-numbering year
  R: {
    priority: 130,
    parse: function (string, token, _match, _options) {
      if (token === 'R') {
        return parseNDigitsSigned(4, string);
      }

      return parseNDigitsSigned(token.length, string);
    },
    set: function (_date, _flags, value, _options) {
      var firstWeekOfYear = new Date(0);
      firstWeekOfYear.setUTCFullYear(value, 0, 4);
      firstWeekOfYear.setUTCHours(0, 0, 0, 0);
      return startOfUTCISOWeek(firstWeekOfYear);
    },
    incompatibleTokens: ['G', 'y', 'Y', 'u', 'Q', 'q', 'M', 'L', 'w', 'd', 'D', 'e', 'c', 't', 'T']
  },
  // Extended year
  u: {
    priority: 130,
    parse: function (string, token, _match, _options) {
      if (token === 'u') {
        return parseNDigitsSigned(4, string);
      }

      return parseNDigitsSigned(token.length, string);
    },
    set: function (date, _flags, value, _options) {
      date.setUTCFullYear(value, 0, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['G', 'y', 'Y', 'R', 'w', 'I', 'i', 'e', 'c', 't', 'T']
  },
  // Quarter
  Q: {
    priority: 120,
    parse: function (string, token, match, _options) {
      switch (token) {
        // 1, 2, 3, 4
        case 'Q':
        case 'QQ':
          // 01, 02, 03, 04
          return parseNDigits(token.length, string);
        // 1st, 2nd, 3rd, 4th

        case 'Qo':
          return match.ordinalNumber(string, {
            unit: 'quarter'
          });
        // Q1, Q2, Q3, Q4

        case 'QQQ':
          return match.quarter(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.quarter(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // 1, 2, 3, 4 (narrow quarter; could be not numerical)

        case 'QQQQQ':
          return match.quarter(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // 1st quarter, 2nd quarter, ...

        case 'QQQQ':
        default:
          return match.quarter(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.quarter(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.quarter(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 4;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMonth((value - 1) * 3, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'q', 'M', 'L', 'w', 'I', 'd', 'D', 'i', 'e', 'c', 't', 'T']
  },
  // Stand-alone quarter
  q: {
    priority: 120,
    parse: function (string, token, match, _options) {
      switch (token) {
        // 1, 2, 3, 4
        case 'q':
        case 'qq':
          // 01, 02, 03, 04
          return parseNDigits(token.length, string);
        // 1st, 2nd, 3rd, 4th

        case 'qo':
          return match.ordinalNumber(string, {
            unit: 'quarter'
          });
        // Q1, Q2, Q3, Q4

        case 'qqq':
          return match.quarter(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.quarter(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // 1, 2, 3, 4 (narrow quarter; could be not numerical)

        case 'qqqqq':
          return match.quarter(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // 1st quarter, 2nd quarter, ...

        case 'qqqq':
        default:
          return match.quarter(string, {
            width: 'wide',
            context: 'standalone'
          }) || match.quarter(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.quarter(string, {
            width: 'narrow',
            context: 'standalone'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 4;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMonth((value - 1) * 3, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'Q', 'M', 'L', 'w', 'I', 'd', 'D', 'i', 'e', 'c', 't', 'T']
  },
  // Month
  M: {
    priority: 110,
    parse: function (string, token, match, _options) {
      var valueCallback = function (value) {
        return value - 1;
      };

      switch (token) {
        // 1, 2, ..., 12
        case 'M':
          return parseNumericPattern(numericPatterns.month, string, valueCallback);
        // 01, 02, ..., 12

        case 'MM':
          return parseNDigits(2, string, valueCallback);
        // 1st, 2nd, ..., 12th

        case 'Mo':
          return match.ordinalNumber(string, {
            unit: 'month',
            valueCallback: valueCallback
          });
        // Jan, Feb, ..., Dec

        case 'MMM':
          return match.month(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.month(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // J, F, ..., D

        case 'MMMMM':
          return match.month(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // January, February, ..., December

        case 'MMMM':
        default:
          return match.month(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.month(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.month(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 11;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMonth(value, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'q', 'Q', 'L', 'w', 'I', 'D', 'i', 'e', 'c', 't', 'T']
  },
  // Stand-alone month
  L: {
    priority: 110,
    parse: function (string, token, match, _options) {
      var valueCallback = function (value) {
        return value - 1;
      };

      switch (token) {
        // 1, 2, ..., 12
        case 'L':
          return parseNumericPattern(numericPatterns.month, string, valueCallback);
        // 01, 02, ..., 12

        case 'LL':
          return parseNDigits(2, string, valueCallback);
        // 1st, 2nd, ..., 12th

        case 'Lo':
          return match.ordinalNumber(string, {
            unit: 'month',
            valueCallback: valueCallback
          });
        // Jan, Feb, ..., Dec

        case 'LLL':
          return match.month(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.month(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // J, F, ..., D

        case 'LLLLL':
          return match.month(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // January, February, ..., December

        case 'LLLL':
        default:
          return match.month(string, {
            width: 'wide',
            context: 'standalone'
          }) || match.month(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.month(string, {
            width: 'narrow',
            context: 'standalone'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 11;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMonth(value, 1);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'q', 'Q', 'M', 'w', 'I', 'D', 'i', 'e', 'c', 't', 'T']
  },
  // Local week of year
  w: {
    priority: 100,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'w':
          return parseNumericPattern(numericPatterns.week, string);

        case 'wo':
          return match.ordinalNumber(string, {
            unit: 'week'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 53;
    },
    set: function (date, _flags, value, options) {
      return startOfUTCWeek(setUTCWeek(date, value, options), options);
    },
    incompatibleTokens: ['y', 'R', 'u', 'q', 'Q', 'M', 'L', 'I', 'd', 'D', 'i', 't', 'T']
  },
  // ISO week of year
  I: {
    priority: 100,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'I':
          return parseNumericPattern(numericPatterns.week, string);

        case 'Io':
          return match.ordinalNumber(string, {
            unit: 'week'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 53;
    },
    set: function (date, _flags, value, options) {
      return startOfUTCISOWeek(setUTCISOWeek(date, value, options), options);
    },
    incompatibleTokens: ['y', 'Y', 'u', 'q', 'Q', 'M', 'L', 'w', 'd', 'D', 'e', 'c', 't', 'T']
  },
  // Day of the month
  d: {
    priority: 90,
    subPriority: 1,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'd':
          return parseNumericPattern(numericPatterns.date, string);

        case 'do':
          return match.ordinalNumber(string, {
            unit: 'date'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (date, value, _options) {
      var year = date.getUTCFullYear();
      var isLeapYear = isLeapYearIndex$1(year);
      var month = date.getUTCMonth();

      if (isLeapYear) {
        return value >= 1 && value <= DAYS_IN_MONTH_LEAP_YEAR[month];
      } else {
        return value >= 1 && value <= DAYS_IN_MONTH[month];
      }
    },
    set: function (date, _flags, value, _options) {
      date.setUTCDate(value);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'q', 'Q', 'w', 'I', 'D', 'i', 'e', 'c', 't', 'T']
  },
  // Day of year
  D: {
    priority: 90,
    subPriority: 1,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'D':
        case 'DD':
          return parseNumericPattern(numericPatterns.dayOfYear, string);

        case 'Do':
          return match.ordinalNumber(string, {
            unit: 'date'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (date, value, _options) {
      var year = date.getUTCFullYear();
      var isLeapYear = isLeapYearIndex$1(year);

      if (isLeapYear) {
        return value >= 1 && value <= 366;
      } else {
        return value >= 1 && value <= 365;
      }
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMonth(0, value);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['Y', 'R', 'q', 'Q', 'M', 'L', 'w', 'I', 'd', 'E', 'i', 'e', 'c', 't', 'T']
  },
  // Day of week
  E: {
    priority: 90,
    parse: function (string, token, match, _options) {
      switch (token) {
        // Tue
        case 'E':
        case 'EE':
        case 'EEE':
          return match.day(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // T

        case 'EEEEE':
          return match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // Tu

        case 'EEEEEE':
          return match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // Tuesday

        case 'EEEE':
        default:
          return match.day(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.day(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 6;
    },
    set: function (date, _flags, value, options) {
      date = setUTCDay(date, value, options);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['D', 'i', 'e', 'c', 't', 'T']
  },
  // Local day of week
  e: {
    priority: 90,
    parse: function (string, token, match, options) {
      var valueCallback = function (value) {
        var wholeWeekDays = Math.floor((value - 1) / 7) * 7;
        return (value + options.weekStartsOn + 6) % 7 + wholeWeekDays;
      };

      switch (token) {
        // 3
        case 'e':
        case 'ee':
          // 03
          return parseNDigits(token.length, string, valueCallback);
        // 3rd

        case 'eo':
          return match.ordinalNumber(string, {
            unit: 'day',
            valueCallback: valueCallback
          });
        // Tue

        case 'eee':
          return match.day(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // T

        case 'eeeee':
          return match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // Tu

        case 'eeeeee':
          return match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
        // Tuesday

        case 'eeee':
        default:
          return match.day(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.day(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.day(string, {
            width: 'short',
            context: 'formatting'
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 6;
    },
    set: function (date, _flags, value, options) {
      date = setUTCDay(date, value, options);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['y', 'R', 'u', 'q', 'Q', 'M', 'L', 'I', 'd', 'D', 'E', 'i', 'c', 't', 'T']
  },
  // Stand-alone local day of week
  c: {
    priority: 90,
    parse: function (string, token, match, options) {
      var valueCallback = function (value) {
        var wholeWeekDays = Math.floor((value - 1) / 7) * 7;
        return (value + options.weekStartsOn + 6) % 7 + wholeWeekDays;
      };

      switch (token) {
        // 3
        case 'c':
        case 'cc':
          // 03
          return parseNDigits(token.length, string, valueCallback);
        // 3rd

        case 'co':
          return match.ordinalNumber(string, {
            unit: 'day',
            valueCallback: valueCallback
          });
        // Tue

        case 'ccc':
          return match.day(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.day(string, {
            width: 'short',
            context: 'standalone'
          }) || match.day(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // T

        case 'ccccc':
          return match.day(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // Tu

        case 'cccccc':
          return match.day(string, {
            width: 'short',
            context: 'standalone'
          }) || match.day(string, {
            width: 'narrow',
            context: 'standalone'
          });
        // Tuesday

        case 'cccc':
        default:
          return match.day(string, {
            width: 'wide',
            context: 'standalone'
          }) || match.day(string, {
            width: 'abbreviated',
            context: 'standalone'
          }) || match.day(string, {
            width: 'short',
            context: 'standalone'
          }) || match.day(string, {
            width: 'narrow',
            context: 'standalone'
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 6;
    },
    set: function (date, _flags, value, options) {
      date = setUTCDay(date, value, options);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['y', 'R', 'u', 'q', 'Q', 'M', 'L', 'I', 'd', 'D', 'E', 'i', 'e', 't', 'T']
  },
  // ISO day of week
  i: {
    priority: 90,
    parse: function (string, token, match, _options) {
      var valueCallback = function (value) {
        if (value === 0) {
          return 7;
        }

        return value;
      };

      switch (token) {
        // 2
        case 'i':
        case 'ii':
          // 02
          return parseNDigits(token.length, string);
        // 2nd

        case 'io':
          return match.ordinalNumber(string, {
            unit: 'day'
          });
        // Tue

        case 'iii':
          return match.day(string, {
            width: 'abbreviated',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'short',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting',
            valueCallback: valueCallback
          });
        // T

        case 'iiiii':
          return match.day(string, {
            width: 'narrow',
            context: 'formatting',
            valueCallback: valueCallback
          });
        // Tu

        case 'iiiiii':
          return match.day(string, {
            width: 'short',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting',
            valueCallback: valueCallback
          });
        // Tuesday

        case 'iiii':
        default:
          return match.day(string, {
            width: 'wide',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'abbreviated',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'short',
            context: 'formatting',
            valueCallback: valueCallback
          }) || match.day(string, {
            width: 'narrow',
            context: 'formatting',
            valueCallback: valueCallback
          });
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 7;
    },
    set: function (date, _flags, value, options) {
      date = setUTCISODay(date, value, options);
      date.setUTCHours(0, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['y', 'Y', 'u', 'q', 'Q', 'M', 'L', 'w', 'd', 'D', 'E', 'e', 'c', 't', 'T']
  },
  // AM or PM
  a: {
    priority: 80,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'a':
        case 'aa':
        case 'aaa':
          return match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'aaaaa':
          return match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'aaaa':
        default:
          return match.dayPeriod(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    set: function (date, _flags, value, _options) {
      date.setUTCHours(dayPeriodEnumToHours(value), 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['b', 'B', 'H', 'K', 'k', 't', 'T']
  },
  // AM, PM, midnight
  b: {
    priority: 80,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'b':
        case 'bb':
        case 'bbb':
          return match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'bbbbb':
          return match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'bbbb':
        default:
          return match.dayPeriod(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    set: function (date, _flags, value, _options) {
      date.setUTCHours(dayPeriodEnumToHours(value), 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['a', 'B', 'H', 'K', 'k', 't', 'T']
  },
  // in the morning, in the afternoon, in the evening, at night
  B: {
    priority: 80,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'B':
        case 'BB':
        case 'BBB':
          return match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'BBBBB':
          return match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });

        case 'BBBB':
        default:
          return match.dayPeriod(string, {
            width: 'wide',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'abbreviated',
            context: 'formatting'
          }) || match.dayPeriod(string, {
            width: 'narrow',
            context: 'formatting'
          });
      }
    },
    set: function (date, _flags, value, _options) {
      date.setUTCHours(dayPeriodEnumToHours(value), 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['a', 'b', 't', 'T']
  },
  // Hour [1-12]
  h: {
    priority: 70,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'h':
          return parseNumericPattern(numericPatterns.hour12h, string);

        case 'ho':
          return match.ordinalNumber(string, {
            unit: 'hour'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 12;
    },
    set: function (date, _flags, value, _options) {
      var isPM = date.getUTCHours() >= 12;

      if (isPM && value < 12) {
        date.setUTCHours(value + 12, 0, 0, 0);
      } else if (!isPM && value === 12) {
        date.setUTCHours(0, 0, 0, 0);
      } else {
        date.setUTCHours(value, 0, 0, 0);
      }

      return date;
    },
    incompatibleTokens: ['H', 'K', 'k', 't', 'T']
  },
  // Hour [0-23]
  H: {
    priority: 70,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'H':
          return parseNumericPattern(numericPatterns.hour23h, string);

        case 'Ho':
          return match.ordinalNumber(string, {
            unit: 'hour'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 23;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCHours(value, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['a', 'b', 'h', 'K', 'k', 't', 'T']
  },
  // Hour [0-11]
  K: {
    priority: 70,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'K':
          return parseNumericPattern(numericPatterns.hour11h, string);

        case 'Ko':
          return match.ordinalNumber(string, {
            unit: 'hour'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 11;
    },
    set: function (date, _flags, value, _options) {
      var isPM = date.getUTCHours() >= 12;

      if (isPM && value < 12) {
        date.setUTCHours(value + 12, 0, 0, 0);
      } else {
        date.setUTCHours(value, 0, 0, 0);
      }

      return date;
    },
    incompatibleTokens: ['a', 'b', 'h', 'H', 'k', 't', 'T']
  },
  // Hour [1-24]
  k: {
    priority: 70,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'k':
          return parseNumericPattern(numericPatterns.hour24h, string);

        case 'ko':
          return match.ordinalNumber(string, {
            unit: 'hour'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 1 && value <= 24;
    },
    set: function (date, _flags, value, _options) {
      var hours = value <= 24 ? value % 24 : value;
      date.setUTCHours(hours, 0, 0, 0);
      return date;
    },
    incompatibleTokens: ['a', 'b', 'h', 'H', 'K', 't', 'T']
  },
  // Minute
  m: {
    priority: 60,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 'm':
          return parseNumericPattern(numericPatterns.minute, string);

        case 'mo':
          return match.ordinalNumber(string, {
            unit: 'minute'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 59;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMinutes(value, 0, 0);
      return date;
    },
    incompatibleTokens: ['t', 'T']
  },
  // Second
  s: {
    priority: 50,
    parse: function (string, token, match, _options) {
      switch (token) {
        case 's':
          return parseNumericPattern(numericPatterns.second, string);

        case 'so':
          return match.ordinalNumber(string, {
            unit: 'second'
          });

        default:
          return parseNDigits(token.length, string);
      }
    },
    validate: function (_date, value, _options) {
      return value >= 0 && value <= 59;
    },
    set: function (date, _flags, value, _options) {
      date.setUTCSeconds(value, 0);
      return date;
    },
    incompatibleTokens: ['t', 'T']
  },
  // Fraction of second
  S: {
    priority: 30,
    parse: function (string, token, _match, _options) {
      var valueCallback = function (value) {
        return Math.floor(value * Math.pow(10, -token.length + 3));
      };

      return parseNDigits(token.length, string, valueCallback);
    },
    set: function (date, _flags, value, _options) {
      date.setUTCMilliseconds(value);
      return date;
    },
    incompatibleTokens: ['t', 'T']
  },
  // Timezone (ISO-8601. +00:00 is `'Z'`)
  X: {
    priority: 10,
    parse: function (string, token, _match, _options) {
      switch (token) {
        case 'X':
          return parseTimezonePattern(timezonePatterns.basicOptionalMinutes, string);

        case 'XX':
          return parseTimezonePattern(timezonePatterns.basic, string);

        case 'XXXX':
          return parseTimezonePattern(timezonePatterns.basicOptionalSeconds, string);

        case 'XXXXX':
          return parseTimezonePattern(timezonePatterns.extendedOptionalSeconds, string);

        case 'XXX':
        default:
          return parseTimezonePattern(timezonePatterns.extended, string);
      }
    },
    set: function (date, flags, value, _options) {
      if (flags.timestampIsSet) {
        return date;
      }

      return new Date(date.getTime() - value);
    },
    incompatibleTokens: ['t', 'T', 'x']
  },
  // Timezone (ISO-8601)
  x: {
    priority: 10,
    parse: function (string, token, _match, _options) {
      switch (token) {
        case 'x':
          return parseTimezonePattern(timezonePatterns.basicOptionalMinutes, string);

        case 'xx':
          return parseTimezonePattern(timezonePatterns.basic, string);

        case 'xxxx':
          return parseTimezonePattern(timezonePatterns.basicOptionalSeconds, string);

        case 'xxxxx':
          return parseTimezonePattern(timezonePatterns.extendedOptionalSeconds, string);

        case 'xxx':
        default:
          return parseTimezonePattern(timezonePatterns.extended, string);
      }
    },
    set: function (date, flags, value, _options) {
      if (flags.timestampIsSet) {
        return date;
      }

      return new Date(date.getTime() - value);
    },
    incompatibleTokens: ['t', 'T', 'X']
  },
  // Seconds timestamp
  t: {
    priority: 40,
    parse: function (string, _token, _match, _options) {
      return parseAnyDigitsSigned(string);
    },
    set: function (_date, _flags, value, _options) {
      return [new Date(value * 1000), {
        timestampIsSet: true
      }];
    },
    incompatibleTokens: '*'
  },
  // Milliseconds timestamp
  T: {
    priority: 20,
    parse: function (string, _token, _match, _options) {
      return parseAnyDigitsSigned(string);
    },
    set: function (_date, _flags, value, _options) {
      return [new Date(value), {
        timestampIsSet: true
      }];
    },
    incompatibleTokens: '*'
  }
};

var TIMEZONE_UNIT_PRIORITY = 10; // This RegExp consists of three parts separated by `|`:
// - [yYQqMLwIdDecihHKkms]o matches any available ordinal number token
//   (one of the certain letters followed by `o`)
// - (\w)\1* matches any sequences of the same letter
// - '' matches two quote characters in a row
// - '(''|[^'])+('|$) matches anything surrounded by two quote characters ('),
//   except a single quote symbol, which ends the sequence.
//   Two quote characters do not end the sequence.
//   If there is no matching single quote
//   then the sequence will continue until the end of the string.
// - . matches any single character unmatched by previous parts of the RegExps

var formattingTokensRegExp = /[yYQqMLwIdDecihHKkms]o|(\w)\1*|''|'(''|[^'])+('|$)|./g; // This RegExp catches symbols escaped by quotes, and also
// sequences of symbols P, p, and the combinations like `PPPPPPPppppp`

var longFormattingTokensRegExp = /P+p+|P+|p+|''|'(''|[^'])+('|$)|./g;
var escapedStringRegExp = /^'([^]*?)'?$/;
var doubleQuoteRegExp = /''/g;
var notWhitespaceRegExp = /\S/;
var unescapedLatinCharacterRegExp = /[a-zA-Z]/;
/**
 * @name parse
 * @category Common Helpers
 * @summary Parse the date.
 *
 * @description
 * Return the date parsed from string using the given format string.
 *
 * > ⚠️ Please note that the `format` tokens differ from Moment.js and other libraries.
 * > See: https://git.io/fxCyr
 *
 * The characters in the format string wrapped between two single quotes characters (') are escaped.
 * Two single quotes in a row, whether inside or outside a quoted sequence, represent a 'real' single quote.
 *
 * Format of the format string is based on Unicode Technical Standard #35:
 * https://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
 * with a few additions (see note 5 below the table).
 *
 * Not all tokens are compatible. Combinations that don't make sense or could lead to bugs are prohibited
 * and will throw `RangeError`. For example usage of 24-hour format token with AM/PM token will throw an exception:
 *
 * ```javascript
 * parse('23 AM', 'HH a', new Date())
 * //=> RangeError: The format string mustn't contain `HH` and `a` at the same time
 * ```
 *
 * See the compatibility table: https://docs.google.com/spreadsheets/d/e/2PACX-1vQOPU3xUhplll6dyoMmVUXHKl_8CRDs6_ueLmex3SoqwhuolkuN3O05l4rqx5h1dKX8eb46Ul-CCSrq/pubhtml?gid=0&single=true
 *
 * Accepted format string patterns:
 * | Unit                            |Prior| Pattern | Result examples                   | Notes |
 * |---------------------------------|-----|---------|-----------------------------------|-------|
 * | Era                             | 140 | G..GGG  | AD, BC                            |       |
 * |                                 |     | GGGG    | Anno Domini, Before Christ        | 2     |
 * |                                 |     | GGGGG   | A, B                              |       |
 * | Calendar year                   | 130 | y       | 44, 1, 1900, 2017, 9999           | 4     |
 * |                                 |     | yo      | 44th, 1st, 1900th, 9999999th      | 4,5   |
 * |                                 |     | yy      | 44, 01, 00, 17                    | 4     |
 * |                                 |     | yyy     | 044, 001, 123, 999                | 4     |
 * |                                 |     | yyyy    | 0044, 0001, 1900, 2017            | 4     |
 * |                                 |     | yyyyy   | ...                               | 2,4   |
 * | Local week-numbering year       | 130 | Y       | 44, 1, 1900, 2017, 9000           | 4     |
 * |                                 |     | Yo      | 44th, 1st, 1900th, 9999999th      | 4,5   |
 * |                                 |     | YY      | 44, 01, 00, 17                    | 4,6   |
 * |                                 |     | YYY     | 044, 001, 123, 999                | 4     |
 * |                                 |     | YYYY    | 0044, 0001, 1900, 2017            | 4,6   |
 * |                                 |     | YYYYY   | ...                               | 2,4   |
 * | ISO week-numbering year         | 130 | R       | -43, 1, 1900, 2017, 9999, -9999   | 4,5   |
 * |                                 |     | RR      | -43, 01, 00, 17                   | 4,5   |
 * |                                 |     | RRR     | -043, 001, 123, 999, -999         | 4,5   |
 * |                                 |     | RRRR    | -0043, 0001, 2017, 9999, -9999    | 4,5   |
 * |                                 |     | RRRRR   | ...                               | 2,4,5 |
 * | Extended year                   | 130 | u       | -43, 1, 1900, 2017, 9999, -999    | 4     |
 * |                                 |     | uu      | -43, 01, 99, -99                  | 4     |
 * |                                 |     | uuu     | -043, 001, 123, 999, -999         | 4     |
 * |                                 |     | uuuu    | -0043, 0001, 2017, 9999, -9999    | 4     |
 * |                                 |     | uuuuu   | ...                               | 2,4   |
 * | Quarter (formatting)            | 120 | Q       | 1, 2, 3, 4                        |       |
 * |                                 |     | Qo      | 1st, 2nd, 3rd, 4th                | 5     |
 * |                                 |     | QQ      | 01, 02, 03, 04                    |       |
 * |                                 |     | QQQ     | Q1, Q2, Q3, Q4                    |       |
 * |                                 |     | QQQQ    | 1st quarter, 2nd quarter, ...     | 2     |
 * |                                 |     | QQQQQ   | 1, 2, 3, 4                        | 4     |
 * | Quarter (stand-alone)           | 120 | q       | 1, 2, 3, 4                        |       |
 * |                                 |     | qo      | 1st, 2nd, 3rd, 4th                | 5     |
 * |                                 |     | qq      | 01, 02, 03, 04                    |       |
 * |                                 |     | qqq     | Q1, Q2, Q3, Q4                    |       |
 * |                                 |     | qqqq    | 1st quarter, 2nd quarter, ...     | 2     |
 * |                                 |     | qqqqq   | 1, 2, 3, 4                        | 3     |
 * | Month (formatting)              | 110 | M       | 1, 2, ..., 12                     |       |
 * |                                 |     | Mo      | 1st, 2nd, ..., 12th               | 5     |
 * |                                 |     | MM      | 01, 02, ..., 12                   |       |
 * |                                 |     | MMM     | Jan, Feb, ..., Dec                |       |
 * |                                 |     | MMMM    | January, February, ..., December  | 2     |
 * |                                 |     | MMMMM   | J, F, ..., D                      |       |
 * | Month (stand-alone)             | 110 | L       | 1, 2, ..., 12                     |       |
 * |                                 |     | Lo      | 1st, 2nd, ..., 12th               | 5     |
 * |                                 |     | LL      | 01, 02, ..., 12                   |       |
 * |                                 |     | LLL     | Jan, Feb, ..., Dec                |       |
 * |                                 |     | LLLL    | January, February, ..., December  | 2     |
 * |                                 |     | LLLLL   | J, F, ..., D                      |       |
 * | Local week of year              | 100 | w       | 1, 2, ..., 53                     |       |
 * |                                 |     | wo      | 1st, 2nd, ..., 53th               | 5     |
 * |                                 |     | ww      | 01, 02, ..., 53                   |       |
 * | ISO week of year                | 100 | I       | 1, 2, ..., 53                     | 5     |
 * |                                 |     | Io      | 1st, 2nd, ..., 53th               | 5     |
 * |                                 |     | II      | 01, 02, ..., 53                   | 5     |
 * | Day of month                    |  90 | d       | 1, 2, ..., 31                     |       |
 * |                                 |     | do      | 1st, 2nd, ..., 31st               | 5     |
 * |                                 |     | dd      | 01, 02, ..., 31                   |       |
 * | Day of year                     |  90 | D       | 1, 2, ..., 365, 366               | 7     |
 * |                                 |     | Do      | 1st, 2nd, ..., 365th, 366th       | 5     |
 * |                                 |     | DD      | 01, 02, ..., 365, 366             | 7     |
 * |                                 |     | DDD     | 001, 002, ..., 365, 366           |       |
 * |                                 |     | DDDD    | ...                               | 2     |
 * | Day of week (formatting)        |  90 | E..EEE  | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 |     | EEEE    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 |     | EEEEE   | M, T, W, T, F, S, S               |       |
 * |                                 |     | EEEEEE  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | ISO day of week (formatting)    |  90 | i       | 1, 2, 3, ..., 7                   | 5     |
 * |                                 |     | io      | 1st, 2nd, ..., 7th                | 5     |
 * |                                 |     | ii      | 01, 02, ..., 07                   | 5     |
 * |                                 |     | iii     | Mon, Tue, Wed, ..., Sun           | 5     |
 * |                                 |     | iiii    | Monday, Tuesday, ..., Sunday      | 2,5   |
 * |                                 |     | iiiii   | M, T, W, T, F, S, S               | 5     |
 * |                                 |     | iiiiii  | Mo, Tu, We, Th, Fr, Su, Sa        | 5     |
 * | Local day of week (formatting)  |  90 | e       | 2, 3, 4, ..., 1                   |       |
 * |                                 |     | eo      | 2nd, 3rd, ..., 1st                | 5     |
 * |                                 |     | ee      | 02, 03, ..., 01                   |       |
 * |                                 |     | eee     | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 |     | eeee    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 |     | eeeee   | M, T, W, T, F, S, S               |       |
 * |                                 |     | eeeeee  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | Local day of week (stand-alone) |  90 | c       | 2, 3, 4, ..., 1                   |       |
 * |                                 |     | co      | 2nd, 3rd, ..., 1st                | 5     |
 * |                                 |     | cc      | 02, 03, ..., 01                   |       |
 * |                                 |     | ccc     | Mon, Tue, Wed, ..., Sun           |       |
 * |                                 |     | cccc    | Monday, Tuesday, ..., Sunday      | 2     |
 * |                                 |     | ccccc   | M, T, W, T, F, S, S               |       |
 * |                                 |     | cccccc  | Mo, Tu, We, Th, Fr, Su, Sa        |       |
 * | AM, PM                          |  80 | a..aaa  | AM, PM                            |       |
 * |                                 |     | aaaa    | a.m., p.m.                        | 2     |
 * |                                 |     | aaaaa   | a, p                              |       |
 * | AM, PM, noon, midnight          |  80 | b..bbb  | AM, PM, noon, midnight            |       |
 * |                                 |     | bbbb    | a.m., p.m., noon, midnight        | 2     |
 * |                                 |     | bbbbb   | a, p, n, mi                       |       |
 * | Flexible day period             |  80 | B..BBB  | at night, in the morning, ...     |       |
 * |                                 |     | BBBB    | at night, in the morning, ...     | 2     |
 * |                                 |     | BBBBB   | at night, in the morning, ...     |       |
 * | Hour [1-12]                     |  70 | h       | 1, 2, ..., 11, 12                 |       |
 * |                                 |     | ho      | 1st, 2nd, ..., 11th, 12th         | 5     |
 * |                                 |     | hh      | 01, 02, ..., 11, 12               |       |
 * | Hour [0-23]                     |  70 | H       | 0, 1, 2, ..., 23                  |       |
 * |                                 |     | Ho      | 0th, 1st, 2nd, ..., 23rd          | 5     |
 * |                                 |     | HH      | 00, 01, 02, ..., 23               |       |
 * | Hour [0-11]                     |  70 | K       | 1, 2, ..., 11, 0                  |       |
 * |                                 |     | Ko      | 1st, 2nd, ..., 11th, 0th          | 5     |
 * |                                 |     | KK      | 01, 02, ..., 11, 00               |       |
 * | Hour [1-24]                     |  70 | k       | 24, 1, 2, ..., 23                 |       |
 * |                                 |     | ko      | 24th, 1st, 2nd, ..., 23rd         | 5     |
 * |                                 |     | kk      | 24, 01, 02, ..., 23               |       |
 * | Minute                          |  60 | m       | 0, 1, ..., 59                     |       |
 * |                                 |     | mo      | 0th, 1st, ..., 59th               | 5     |
 * |                                 |     | mm      | 00, 01, ..., 59                   |       |
 * | Second                          |  50 | s       | 0, 1, ..., 59                     |       |
 * |                                 |     | so      | 0th, 1st, ..., 59th               | 5     |
 * |                                 |     | ss      | 00, 01, ..., 59                   |       |
 * | Seconds timestamp               |  40 | t       | 512969520                         |       |
 * |                                 |     | tt      | ...                               | 2     |
 * | Fraction of second              |  30 | S       | 0, 1, ..., 9                      |       |
 * |                                 |     | SS      | 00, 01, ..., 99                   |       |
 * |                                 |     | SSS     | 000, 0001, ..., 999               |       |
 * |                                 |     | SSSS    | ...                               | 2     |
 * | Milliseconds timestamp          |  20 | T       | 512969520900                      |       |
 * |                                 |     | TT      | ...                               | 2     |
 * | Timezone (ISO-8601 w/ Z)        |  10 | X       | -08, +0530, Z                     |       |
 * |                                 |     | XX      | -0800, +0530, Z                   |       |
 * |                                 |     | XXX     | -08:00, +05:30, Z                 |       |
 * |                                 |     | XXXX    | -0800, +0530, Z, +123456          | 2     |
 * |                                 |     | XXXXX   | -08:00, +05:30, Z, +12:34:56      |       |
 * | Timezone (ISO-8601 w/o Z)       |  10 | x       | -08, +0530, +00                   |       |
 * |                                 |     | xx      | -0800, +0530, +0000               |       |
 * |                                 |     | xxx     | -08:00, +05:30, +00:00            | 2     |
 * |                                 |     | xxxx    | -0800, +0530, +0000, +123456      |       |
 * |                                 |     | xxxxx   | -08:00, +05:30, +00:00, +12:34:56 |       |
 * | Long localized date             |  NA | P       | 05/29/1453                        | 5,8   |
 * |                                 |     | PP      | May 29, 1453                      |       |
 * |                                 |     | PPP     | May 29th, 1453                    |       |
 * |                                 |     | PPPP    | Sunday, May 29th, 1453            | 2,5,8 |
 * | Long localized time             |  NA | p       | 12:00 AM                          | 5,8   |
 * |                                 |     | pp      | 12:00:00 AM                       |       |
 * | Combination of date and time    |  NA | Pp      | 05/29/1453, 12:00 AM              |       |
 * |                                 |     | PPpp    | May 29, 1453, 12:00:00 AM         |       |
 * |                                 |     | PPPpp   | May 29th, 1453 at ...             |       |
 * |                                 |     | PPPPpp  | Sunday, May 29th, 1453 at ...     | 2,5,8 |
 * Notes:
 * 1. "Formatting" units (e.g. formatting quarter) in the default en-US locale
 *    are the same as "stand-alone" units, but are different in some languages.
 *    "Formatting" units are declined according to the rules of the language
 *    in the context of a date. "Stand-alone" units are always nominative singular.
 *    In `format` function, they will produce different result:
 *
 *    `format(new Date(2017, 10, 6), 'do LLLL', {locale: cs}) //=> '6. listopad'`
 *
 *    `format(new Date(2017, 10, 6), 'do MMMM', {locale: cs}) //=> '6. listopadu'`
 *
 *    `parse` will try to match both formatting and stand-alone units interchangably.
 *
 * 2. Any sequence of the identical letters is a pattern, unless it is escaped by
 *    the single quote characters (see below).
 *    If the sequence is longer than listed in table:
 *    - for numerical units (`yyyyyyyy`) `parse` will try to match a number
 *      as wide as the sequence
 *    - for text units (`MMMMMMMM`) `parse` will try to match the widest variation of the unit.
 *      These variations are marked with "2" in the last column of the table.
 *
 * 3. `QQQQQ` and `qqqqq` could be not strictly numerical in some locales.
 *    These tokens represent the shortest form of the quarter.
 *
 * 4. The main difference between `y` and `u` patterns are B.C. years:
 *
 *    | Year | `y` | `u` |
 *    |------|-----|-----|
 *    | AC 1 |   1 |   1 |
 *    | BC 1 |   1 |   0 |
 *    | BC 2 |   2 |  -1 |
 *
 *    Also `yy` will try to guess the century of two digit year by proximity with `referenceDate`:
 *
 *    `parse('50', 'yy', new Date(2018, 0, 1)) //=> Sat Jan 01 2050 00:00:00`
 *
 *    `parse('75', 'yy', new Date(2018, 0, 1)) //=> Wed Jan 01 1975 00:00:00`
 *
 *    while `uu` will just assign the year as is:
 *
 *    `parse('50', 'uu', new Date(2018, 0, 1)) //=> Sat Jan 01 0050 00:00:00`
 *
 *    `parse('75', 'uu', new Date(2018, 0, 1)) //=> Tue Jan 01 0075 00:00:00`
 *
 *    The same difference is true for local and ISO week-numbering years (`Y` and `R`),
 *    except local week-numbering years are dependent on `options.weekStartsOn`
 *    and `options.firstWeekContainsDate` (compare [setISOWeekYear]{@link https://date-fns.org/docs/setISOWeekYear}
 *    and [setWeekYear]{@link https://date-fns.org/docs/setWeekYear}).
 *
 * 5. These patterns are not in the Unicode Technical Standard #35:
 *    - `i`: ISO day of week
 *    - `I`: ISO week of year
 *    - `R`: ISO week-numbering year
 *    - `o`: ordinal number modifier
 *    - `P`: long localized date
 *    - `p`: long localized time
 *
 * 6. `YY` and `YYYY` tokens represent week-numbering years but they are often confused with years.
 *    You should enable `options.useAdditionalWeekYearTokens` to use them. See: https://git.io/fxCyr
 *
 * 7. `D` and `DD` tokens represent days of the year but they are ofthen confused with days of the month.
 *    You should enable `options.useAdditionalDayOfYearTokens` to use them. See: https://git.io/fxCyr
 *
 * 8. `P+` tokens do not have a defined priority since they are merely aliases to other tokens based
 *    on the given locale.
 *
 *    using `en-US` locale: `P` => `MM/dd/yyyy`
 *    using `en-US` locale: `p` => `hh:mm a`
 *    using `pt-BR` locale: `P` => `dd/MM/yyyy`
 *    using `pt-BR` locale: `p` => `HH:mm`
 *
 * Values will be assigned to the date in the descending order of its unit's priority.
 * Units of an equal priority overwrite each other in the order of appearance.
 *
 * If no values of higher priority are parsed (e.g. when parsing string 'January 1st' without a year),
 * the values will be taken from 3rd argument `referenceDate` which works as a context of parsing.
 *
 * `referenceDate` must be passed for correct work of the function.
 * If you're not sure which `referenceDate` to supply, create a new instance of Date:
 * `parse('02/11/2014', 'MM/dd/yyyy', new Date())`
 * In this case parsing will be done in the context of the current date.
 * If `referenceDate` is `Invalid Date` or a value not convertible to valid `Date`,
 * then `Invalid Date` will be returned.
 *
 * The result may vary by locale.
 *
 * If `formatString` matches with `dateString` but does not provides tokens, `referenceDate` will be returned.
 *
 * If parsing failed, `Invalid Date` will be returned.
 * Invalid Date is a Date, whose time value is NaN.
 * Time value of Date: http://es5.github.io/#x15.9.1.1
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * - Old `parse` was renamed to `toDate`.
 *   Now `parse` is a new function which parses a string using a provided format.
 *
 *   ```javascript
 *   // Before v2.0.0
 *   parse('2016-01-01')
 *
 *   // v2.0.0 onward (toDate no longer accepts a string)
 *   toDate(1392098430000) // Unix to timestamp
 *   toDate(new Date(2014, 1, 11, 11, 30, 30)) // Cloning the date
 *   parse('2016-01-01', 'yyyy-MM-dd', new Date())
 *   ```
 *
 * @param {String} dateString - the string to parse
 * @param {String} formatString - the string of tokens
 * @param {Date|Number} referenceDate - defines values missing from the parsed dateString
 * @param {Object} [options] - an object with options.
 * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
 * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
 * @param {1|2|3|4|5|6|7} [options.firstWeekContainsDate=1] - the day of January, which is always in the first week of the year
 * @param {Boolean} [options.useAdditionalWeekYearTokens=false] - if true, allows usage of the week-numbering year tokens `YY` and `YYYY`;
 *   see: https://git.io/fxCyr
 * @param {Boolean} [options.useAdditionalDayOfYearTokens=false] - if true, allows usage of the day of year tokens `D` and `DD`;
 *   see: https://git.io/fxCyr
 * @returns {Date} the parsed date
 * @throws {TypeError} 3 arguments required
 * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
 * @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
 * @throws {RangeError} `options.locale` must contain `match` property
 * @throws {RangeError} use `yyyy` instead of `YYYY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `yy` instead of `YY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `d` instead of `D` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} use `dd` instead of `DD` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
 * @throws {RangeError} format string contains an unescaped latin alphabet character
 *
 * @example
 * // Parse 11 February 2014 from middle-endian format:
 * var result = parse('02/11/2014', 'MM/dd/yyyy', new Date())
 * //=> Tue Feb 11 2014 00:00:00
 *
 * @example
 * // Parse 28th of February in Esperanto locale in the context of 2010 year:
 * import eo from 'date-fns/locale/eo'
 * var result = parse('28-a de februaro', "do 'de' MMMM", new Date(2010, 0, 1), {
 *   locale: eo
 * })
 * //=> Sun Feb 28 2010 00:00:00
 */

function parse(dirtyDateString, dirtyFormatString, dirtyReferenceDate, dirtyOptions) {
  requiredArgs(3, arguments);
  var dateString = String(dirtyDateString);
  var formatString = String(dirtyFormatString);
  var options = dirtyOptions || {};
  var locale$1 = options.locale || locale;

  if (!locale$1.match) {
    throw new RangeError('locale must contain match property');
  }

  var localeFirstWeekContainsDate = locale$1.options && locale$1.options.firstWeekContainsDate;
  var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
  var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate); // Test if weekStartsOn is between 1 and 7 _and_ is not NaN

  if (!(firstWeekContainsDate >= 1 && firstWeekContainsDate <= 7)) {
    throw new RangeError('firstWeekContainsDate must be between 1 and 7 inclusively');
  }

  var localeWeekStartsOn = locale$1.options && locale$1.options.weekStartsOn;
  var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
  var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN

  if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
    throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  }

  if (formatString === '') {
    if (dateString === '') {
      return toDate(dirtyReferenceDate);
    } else {
      return new Date(NaN);
    }
  }

  var subFnOptions = {
    firstWeekContainsDate: firstWeekContainsDate,
    weekStartsOn: weekStartsOn,
    locale: locale$1 // If timezone isn't specified, it will be set to the system timezone

  };
  var setters = [{
    priority: TIMEZONE_UNIT_PRIORITY,
    subPriority: -1,
    set: dateToSystemTimezone,
    index: 0
  }];
  var i;
  var tokens = formatString.match(longFormattingTokensRegExp).map(function (substring) {
    var firstCharacter = substring[0];

    if (firstCharacter === 'p' || firstCharacter === 'P') {
      var longFormatter = longFormatters[firstCharacter];
      return longFormatter(substring, locale$1.formatLong, subFnOptions);
    }

    return substring;
  }).join('').match(formattingTokensRegExp);
  var usedTokens = [];

  for (i = 0; i < tokens.length; i++) {
    var token = tokens[i];

    if (!options.useAdditionalWeekYearTokens && isProtectedWeekYearToken(token)) {
      throwProtectedError(token, formatString, dirtyDateString);
    }

    if (!options.useAdditionalDayOfYearTokens && isProtectedDayOfYearToken(token)) {
      throwProtectedError(token, formatString, dirtyDateString);
    }

    var firstCharacter = token[0];
    var parser = parsers[firstCharacter];

    if (parser) {
      var incompatibleTokens = parser.incompatibleTokens;

      if (Array.isArray(incompatibleTokens)) {
        var incompatibleToken = void 0;

        for (var _i = 0; _i < usedTokens.length; _i++) {
          var usedToken = usedTokens[_i].token;

          if (incompatibleTokens.indexOf(usedToken) !== -1 || usedToken === firstCharacter) {
            incompatibleToken = usedTokens[_i];
            break;
          }
        }

        if (incompatibleToken) {
          throw new RangeError("The format string mustn't contain `".concat(incompatibleToken.fullToken, "` and `").concat(token, "` at the same time"));
        }
      } else if (parser.incompatibleTokens === '*' && usedTokens.length) {
        throw new RangeError("The format string mustn't contain `".concat(token, "` and any other token at the same time"));
      }

      usedTokens.push({
        token: firstCharacter,
        fullToken: token
      });
      var parseResult = parser.parse(dateString, token, locale$1.match, subFnOptions);

      if (!parseResult) {
        return new Date(NaN);
      }

      setters.push({
        priority: parser.priority,
        subPriority: parser.subPriority || 0,
        set: parser.set,
        validate: parser.validate,
        value: parseResult.value,
        index: setters.length
      });
      dateString = parseResult.rest;
    } else {
      if (firstCharacter.match(unescapedLatinCharacterRegExp)) {
        throw new RangeError('Format string contains an unescaped latin alphabet character `' + firstCharacter + '`');
      } // Replace two single quote characters with one single quote character


      if (token === "''") {
        token = "'";
      } else if (firstCharacter === "'") {
        token = cleanEscapedString(token);
      } // Cut token from string, or, if string doesn't match the token, return Invalid Date


      if (dateString.indexOf(token) === 0) {
        dateString = dateString.slice(token.length);
      } else {
        return new Date(NaN);
      }
    }
  } // Check if the remaining input contains something other than whitespace


  if (dateString.length > 0 && notWhitespaceRegExp.test(dateString)) {
    return new Date(NaN);
  }

  var uniquePrioritySetters = setters.map(function (setter) {
    return setter.priority;
  }).sort(function (a, b) {
    return b - a;
  }).filter(function (priority, index, array) {
    return array.indexOf(priority) === index;
  }).map(function (priority) {
    return setters.filter(function (setter) {
      return setter.priority === priority;
    }).sort(function (a, b) {
      return b.subPriority - a.subPriority;
    });
  }).map(function (setterArray) {
    return setterArray[0];
  });
  var date = toDate(dirtyReferenceDate);

  if (isNaN(date)) {
    return new Date(NaN);
  } // Convert the date in system timezone to the same date in UTC+00:00 timezone.
  // This ensures that when UTC functions will be implemented, locales will be compatible with them.
  // See an issue about UTC functions: https://github.com/date-fns/date-fns/issues/37


  var utcDate = subMilliseconds(date, getTimezoneOffsetInMilliseconds(date));
  var flags = {};

  for (i = 0; i < uniquePrioritySetters.length; i++) {
    var setter = uniquePrioritySetters[i];

    if (setter.validate && !setter.validate(utcDate, setter.value, subFnOptions)) {
      return new Date(NaN);
    }

    var result = setter.set(utcDate, flags, setter.value, subFnOptions); // Result is tuple (date, flags)

    if (result[0]) {
      utcDate = result[0];
      assign(flags, result[1]); // Result is date
    } else {
      utcDate = result;
    }
  }

  return utcDate;
}

function dateToSystemTimezone(date, flags) {
  if (flags.timestampIsSet) {
    return date;
  }

  var convertedDate = new Date(0);
  convertedDate.setFullYear(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate());
  convertedDate.setHours(date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds(), date.getUTCMilliseconds());
  return convertedDate;
}

function cleanEscapedString(input) {
  return input.match(escapedStringRegExp)[1].replace(doubleQuoteRegExp, "'");
}

/**
 * @name startOfHour
 * @category Hour Helpers
 * @summary Return the start of an hour for the given date.
 *
 * @description
 * Return the start of an hour for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of an hour
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of an hour for 2 September 2014 11:55:00:
 * const result = startOfHour(new Date(2014, 8, 2, 11, 55))
 * //=> Tue Sep 02 2014 11:00:00
 */

function startOfHour(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setMinutes(0, 0, 0);
  return date;
}

/**
 * @name startOfMinute
 * @category Minute Helpers
 * @summary Return the start of a minute for the given date.
 *
 * @description
 * Return the start of a minute for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a minute
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a minute for 1 December 2014 22:15:45.400:
 * const result = startOfMinute(new Date(2014, 11, 1, 22, 15, 45, 400))
 * //=> Mon Dec 01 2014 22:15:00
 */

function startOfMinute(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setSeconds(0, 0);
  return date;
}

/**
 * @name startOfSecond
 * @category Second Helpers
 * @summary Return the start of a second for the given date.
 *
 * @description
 * Return the start of a second for the given date.
 * The result will be in the local timezone.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the start of a second
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The start of a second for 1 December 2014 22:15:45.400:
 * const result = startOfSecond(new Date(2014, 11, 1, 22, 15, 45, 400))
 * //=> Mon Dec 01 2014 22:15:45.000
 */

function startOfSecond(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  date.setMilliseconds(0);
  return date;
}

var MILLISECONDS_IN_HOUR = 3600000;
var MILLISECONDS_IN_MINUTE = 60000;
var DEFAULT_ADDITIONAL_DIGITS = 2;
var patterns = {
  dateTimeDelimiter: /[T ]/,
  timeZoneDelimiter: /[Z ]/i,
  timezone: /([Z+-].*)$/
};
var dateRegex = /^-?(?:(\d{3})|(\d{2})(?:-?(\d{2}))?|W(\d{2})(?:-?(\d{1}))?|)$/;
var timeRegex = /^(\d{2}(?:[.,]\d*)?)(?::?(\d{2}(?:[.,]\d*)?))?(?::?(\d{2}(?:[.,]\d*)?))?$/;
var timezoneRegex = /^([+-])(\d{2})(?::?(\d{2}))?$/;
/**
 * @name parseISO
 * @category Common Helpers
 * @summary Parse ISO string
 *
 * @description
 * Parse the given string in ISO 8601 format and return an instance of Date.
 *
 * Function accepts complete ISO 8601 formats as well as partial implementations.
 * ISO 8601: http://en.wikipedia.org/wiki/ISO_8601
 *
 * If the argument isn't a string, the function cannot parse the string or
 * the values are invalid, it returns Invalid Date.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * - The previous `parse` implementation was renamed to `parseISO`.
 *
 *   ```javascript
 *   // Before v2.0.0
 *   parse('2016-01-01')
 *
 *   // v2.0.0 onward
 *   parseISO('2016-01-01')
 *   ```
 *
 * - `parseISO` now validates separate date and time values in ISO-8601 strings
 *   and returns `Invalid Date` if the date is invalid.
 *
 *   ```javascript
 *   parseISO('2018-13-32')
 *   //=> Invalid Date
 *   ```
 *
 * - `parseISO` now doesn't fall back to `new Date` constructor
 *   if it fails to parse a string argument. Instead, it returns `Invalid Date`.
 *
 * @param {String} argument - the value to convert
 * @param {Object} [options] - an object with options.
 * @param {0|1|2} [options.additionalDigits=2] - the additional number of digits in the extended year format
 * @returns {Date} the parsed date in the local time zone
 * @throws {TypeError} 1 argument required
 * @throws {RangeError} `options.additionalDigits` must be 0, 1 or 2
 *
 * @example
 * // Convert string '2014-02-11T11:30:30' to date:
 * var result = parseISO('2014-02-11T11:30:30')
 * //=> Tue Feb 11 2014 11:30:30
 *
 * @example
 * // Convert string '+02014101' to date,
 * // if the additional number of digits in the extended year format is 1:
 * var result = parseISO('+02014101', { additionalDigits: 1 })
 * //=> Fri Apr 11 2014 00:00:00
 */

function parseISO(argument, dirtyOptions) {
  requiredArgs(1, arguments);
  var options = dirtyOptions || {};
  var additionalDigits = options.additionalDigits == null ? DEFAULT_ADDITIONAL_DIGITS : toInteger(options.additionalDigits);

  if (additionalDigits !== 2 && additionalDigits !== 1 && additionalDigits !== 0) {
    throw new RangeError('additionalDigits must be 0, 1 or 2');
  }

  if (!(typeof argument === 'string' || Object.prototype.toString.call(argument) === '[object String]')) {
    return new Date(NaN);
  }

  var dateStrings = splitDateString(argument);
  var date;

  if (dateStrings.date) {
    var parseYearResult = parseYear(dateStrings.date, additionalDigits);
    date = parseDate(parseYearResult.restDateString, parseYearResult.year);
  }

  if (isNaN(date) || !date) {
    return new Date(NaN);
  }

  var timestamp = date.getTime();
  var time = 0;
  var offset;

  if (dateStrings.time) {
    time = parseTime(dateStrings.time);

    if (isNaN(time) || time === null) {
      return new Date(NaN);
    }
  }

  if (dateStrings.timezone) {
    offset = parseTimezone(dateStrings.timezone);

    if (isNaN(offset)) {
      return new Date(NaN);
    }
  } else {
    var dirtyDate = new Date(timestamp + time); // js parsed string assuming it's in UTC timezone
    // but we need it to be parsed in our timezone
    // so we use utc values to build date in our timezone.
    // Year values from 0 to 99 map to the years 1900 to 1999
    // so set year explicitly with setFullYear.

    var result = new Date(0);
    result.setFullYear(dirtyDate.getUTCFullYear(), dirtyDate.getUTCMonth(), dirtyDate.getUTCDate());
    result.setHours(dirtyDate.getUTCHours(), dirtyDate.getUTCMinutes(), dirtyDate.getUTCSeconds(), dirtyDate.getUTCMilliseconds());
    return result;
  }

  return new Date(timestamp + time + offset);
}

function splitDateString(dateString) {
  var dateStrings = {};
  var array = dateString.split(patterns.dateTimeDelimiter);
  var timeString; // The regex match should only return at maximum two array elements.
  // [date], [time], or [date, time].

  if (array.length > 2) {
    return dateStrings;
  }

  if (/:/.test(array[0])) {
    dateStrings.date = null;
    timeString = array[0];
  } else {
    dateStrings.date = array[0];
    timeString = array[1];

    if (patterns.timeZoneDelimiter.test(dateStrings.date)) {
      dateStrings.date = dateString.split(patterns.timeZoneDelimiter)[0];
      timeString = dateString.substr(dateStrings.date.length, dateString.length);
    }
  }

  if (timeString) {
    var token = patterns.timezone.exec(timeString);

    if (token) {
      dateStrings.time = timeString.replace(token[1], '');
      dateStrings.timezone = token[1];
    } else {
      dateStrings.time = timeString;
    }
  }

  return dateStrings;
}

function parseYear(dateString, additionalDigits) {
  var regex = new RegExp('^(?:(\\d{4}|[+-]\\d{' + (4 + additionalDigits) + '})|(\\d{2}|[+-]\\d{' + (2 + additionalDigits) + '})$)');
  var captures = dateString.match(regex); // Invalid ISO-formatted year

  if (!captures) return {
    year: null
  };
  var year = captures[1] && parseInt(captures[1]);
  var century = captures[2] && parseInt(captures[2]);
  return {
    year: century == null ? year : century * 100,
    restDateString: dateString.slice((captures[1] || captures[2]).length)
  };
}

function parseDate(dateString, year) {
  // Invalid ISO-formatted year
  if (year === null) return null;
  var captures = dateString.match(dateRegex); // Invalid ISO-formatted string

  if (!captures) return null;
  var isWeekDate = !!captures[4];
  var dayOfYear = parseDateUnit(captures[1]);
  var month = parseDateUnit(captures[2]) - 1;
  var day = parseDateUnit(captures[3]);
  var week = parseDateUnit(captures[4]);
  var dayOfWeek = parseDateUnit(captures[5]) - 1;

  if (isWeekDate) {
    if (!validateWeekDate(year, week, dayOfWeek)) {
      return new Date(NaN);
    }

    return dayOfISOWeekYear(year, week, dayOfWeek);
  } else {
    var date = new Date(0);

    if (!validateDate(year, month, day) || !validateDayOfYearDate(year, dayOfYear)) {
      return new Date(NaN);
    }

    date.setUTCFullYear(year, month, Math.max(dayOfYear, day));
    return date;
  }
}

function parseDateUnit(value) {
  return value ? parseInt(value) : 1;
}

function parseTime(timeString) {
  var captures = timeString.match(timeRegex);
  if (!captures) return null; // Invalid ISO-formatted time

  var hours = parseTimeUnit(captures[1]);
  var minutes = parseTimeUnit(captures[2]);
  var seconds = parseTimeUnit(captures[3]);

  if (!validateTime(hours, minutes, seconds)) {
    return NaN;
  }

  return hours * MILLISECONDS_IN_HOUR + minutes * MILLISECONDS_IN_MINUTE + seconds * 1000;
}

function parseTimeUnit(value) {
  return value && parseFloat(value.replace(',', '.')) || 0;
}

function parseTimezone(timezoneString) {
  if (timezoneString === 'Z') return 0;
  var captures = timezoneString.match(timezoneRegex);
  if (!captures) return 0;
  var sign = captures[1] === '+' ? -1 : 1;
  var hours = parseInt(captures[2]);
  var minutes = captures[3] && parseInt(captures[3]) || 0;

  if (!validateTimezone(hours, minutes)) {
    return NaN;
  }

  return sign * (hours * MILLISECONDS_IN_HOUR + minutes * MILLISECONDS_IN_MINUTE);
}

function dayOfISOWeekYear(isoWeekYear, week, day) {
  var date = new Date(0);
  date.setUTCFullYear(isoWeekYear, 0, 4);
  var fourthOfJanuaryDay = date.getUTCDay() || 7;
  var diff = (week - 1) * 7 + day + 1 - fourthOfJanuaryDay;
  date.setUTCDate(date.getUTCDate() + diff);
  return date;
} // Validation functions
// February is null to handle the leap year (using ||)


var daysInMonths = [31, null, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];

function isLeapYearIndex(year) {
  return year % 400 === 0 || year % 4 === 0 && year % 100;
}

function validateDate(year, month, date) {
  return month >= 0 && month <= 11 && date >= 1 && date <= (daysInMonths[month] || (isLeapYearIndex(year) ? 29 : 28));
}

function validateDayOfYearDate(year, dayOfYear) {
  return dayOfYear >= 1 && dayOfYear <= (isLeapYearIndex(year) ? 366 : 365);
}

function validateWeekDate(_year, week, day) {
  return week >= 1 && week <= 53 && day >= 0 && day <= 6;
}

function validateTime(hours, minutes, seconds) {
  if (hours === 24) {
    return minutes === 0 && seconds === 0;
  }

  return seconds >= 0 && seconds < 60 && minutes >= 0 && minutes < 60 && hours >= 0 && hours < 25;
}

function validateTimezone(_hours, minutes) {
  return minutes >= 0 && minutes <= 59;
}

const FORMATS = {
  datetime: 'MMM d, yyyy, h:mm:ss aaaa',
  millisecond: 'h:mm:ss.SSS aaaa',
  second: 'h:mm:ss aaaa',
  minute: 'h:mm aaaa',
  hour: 'ha',
  day: 'MMM d',
  week: 'PP',
  month: 'MMM yyyy',
  quarter: 'qqq - yyyy',
  year: 'yyyy'
};

chart_js._adapters._date.override({
  _id: 'date-fns', // DEBUG

  formats: function() {
    return FORMATS;
  },

  parse: function(value, fmt) {
    if (value === null || typeof value === 'undefined') {
      return null;
    }
    const type = typeof value;
    if (type === 'number' || value instanceof Date) {
      value = toDate(value);
    } else if (type === 'string') {
      if (typeof fmt === 'string') {
        value = parse(value, fmt, new Date(), this.options);
      } else {
        value = parseISO(value, this.options);
      }
    }
    return isValid(value) ? value.getTime() : null;
  },

  format: function(time, fmt) {
    return format(time, fmt, this.options);
  },

  add: function(time, amount, unit) {
    switch (unit) {
    case 'millisecond': return addMilliseconds(time, amount);
    case 'second': return addSeconds(time, amount);
    case 'minute': return addMinutes(time, amount);
    case 'hour': return addHours(time, amount);
    case 'day': return addDays(time, amount);
    case 'week': return addWeeks(time, amount);
    case 'month': return addMonths(time, amount);
    case 'quarter': return addQuarters(time, amount);
    case 'year': return addYears(time, amount);
    default: return time;
    }
  },

  diff: function(max, min, unit) {
    switch (unit) {
    case 'millisecond': return differenceInMilliseconds(max, min);
    case 'second': return differenceInSeconds(max, min);
    case 'minute': return differenceInMinutes(max, min);
    case 'hour': return differenceInHours(max, min);
    case 'day': return differenceInDays(max, min);
    case 'week': return differenceInWeeks(max, min);
    case 'month': return differenceInMonths(max, min);
    case 'quarter': return differenceInQuarters(max, min);
    case 'year': return differenceInYears(max, min);
    default: return 0;
    }
  },

  startOf: function(time, unit, weekday) {
    switch (unit) {
    case 'second': return startOfSecond(time);
    case 'minute': return startOfMinute(time);
    case 'hour': return startOfHour(time);
    case 'day': return startOfDay(time);
    case 'week': return startOfWeek(time);
    case 'isoWeek': return startOfWeek(time, {weekStartsOn: +weekday});
    case 'month': return startOfMonth(time);
    case 'quarter': return startOfQuarter(time);
    case 'year': return startOfYear(time);
    default: return time;
    }
  },

  endOf: function(time, unit) {
    switch (unit) {
    case 'second': return endOfSecond(time);
    case 'minute': return endOfMinute(time);
    case 'hour': return endOfHour(time);
    case 'day': return endOfDay(time);
    case 'week': return endOfWeek(time);
    case 'month': return endOfMonth(time);
    case 'quarter': return endOfQuarter(time);
    case 'year': return endOfYear(time);
    default: return time;
    }
  }
});

})));