shenweishi/node_modules/moment/dist/moment.js

//! moment.js
//! version : 2.29.1
//! authors : Tim Wood, Iskren Chernev, Moment.js contributors
//! license : MIT
//! momentjs.com

var hookCallback;

function hooks() {
    return hookCallback.apply(null, arguments);
}

// This is done to register the method called with moment()
// without creating circular dependencies.
function setHookCallback(callback) {
    hookCallback = callback;
}

function isArray(input) {
    return (
        input instanceof Array ||
        Object.prototype.toString.call(input) === '[object Array]'
    );
}

function isObject(input) {
    // IE8 will treat undefined and null as object if it wasn't for
    // input != null
    return (
        input != null &&
        Object.prototype.toString.call(input) === '[object Object]'
    );
}

function hasOwnProp(a, b) {
    return Object.prototype.hasOwnProperty.call(a, b);
}

function isObjectEmpty(obj) {
    if (Object.getOwnPropertyNames) {
        return Object.getOwnPropertyNames(obj).length === 0;
    } else {
        var k;
        for (k in obj) {
            if (hasOwnProp(obj, k)) {
                return false;
            }
        }
        return true;
    }
}

function isUndefined(input) {
    return input === void 0;
}

function isNumber(input) {
    return (
        typeof input === 'number' ||
        Object.prototype.toString.call(input) === '[object Number]'
    );
}

function isDate(input) {
    return (
        input instanceof Date ||
        Object.prototype.toString.call(input) === '[object Date]'
    );
}

function map(arr, fn) {
    var res = [],
        i;
    for (i = 0; i < arr.length; ++i) {
        res.push(fn(arr[i], i));
    }
    return res;
}

function extend(a, b) {
    for (var i in b) {
        if (hasOwnProp(b, i)) {
            a[i] = b[i];
        }
    }

    if (hasOwnProp(b, 'toString')) {
        a.toString = b.toString;
    }

    if (hasOwnProp(b, 'valueOf')) {
        a.valueOf = b.valueOf;
    }

    return a;
}

function createUTC(input, format, locale, strict) {
    return createLocalOrUTC(input, format, locale, strict, true).utc();
}

function defaultParsingFlags() {
    // We need to deep clone this object.
    return {
        empty: false,
        unusedTokens: [],
        unusedInput: [],
        overflow: -2,
        charsLeftOver: 0,
        nullInput: false,
        invalidEra: null,
        invalidMonth: null,
        invalidFormat: false,
        userInvalidated: false,
        iso: false,
        parsedDateParts: [],
        era: null,
        meridiem: null,
        rfc2822: false,
        weekdayMismatch: false,
    };
}

function getParsingFlags(m) {
    if (m._pf == null) {
        m._pf = defaultParsingFlags();
    }
    return m._pf;
}

var some;
if (Array.prototype.some) {
    some = Array.prototype.some;
} else {
    some = function (fun) {
        var t = Object(this),
            len = t.length >>> 0,
            i;

        for (i = 0; i < len; i++) {
            if (i in t && fun.call(this, t[i], i, t)) {
                return true;
            }
        }

        return false;
    };
}

function isValid(m) {
    if (m._isValid == null) {
        var flags = getParsingFlags(m),
            parsedParts = some.call(flags.parsedDateParts, function (i) {
                return i != null;
            }),
            isNowValid =
                !isNaN(m._d.getTime()) &&
                flags.overflow < 0 &&
                !flags.empty &&
                !flags.invalidEra &&
                !flags.invalidMonth &&
                !flags.invalidWeekday &&
                !flags.weekdayMismatch &&
                !flags.nullInput &&
                !flags.invalidFormat &&
                !flags.userInvalidated &&
                (!flags.meridiem || (flags.meridiem && parsedParts));

        if (m._strict) {
            isNowValid =
                isNowValid &&
                flags.charsLeftOver === 0 &&
                flags.unusedTokens.length === 0 &&
                flags.bigHour === undefined;
        }

        if (Object.isFrozen == null || !Object.isFrozen(m)) {
            m._isValid = isNowValid;
        } else {
            return isNowValid;
        }
    }
    return m._isValid;
}

function createInvalid(flags) {
    var m = createUTC(NaN);
    if (flags != null) {
        extend(getParsingFlags(m), flags);
    } else {
        getParsingFlags(m).userInvalidated = true;
    }

    return m;
}

// Plugins that add properties should also add the key here (null value),
// so we can properly clone ourselves.
var momentProperties = (hooks.momentProperties = []),
    updateInProgress = false;

function copyConfig(to, from) {
    var i, prop, val;

    if (!isUndefined(from._isAMomentObject)) {
        to._isAMomentObject = from._isAMomentObject;
    }
    if (!isUndefined(from._i)) {
        to._i = from._i;
    }
    if (!isUndefined(from._f)) {
        to._f = from._f;
    }
    if (!isUndefined(from._l)) {
        to._l = from._l;
    }
    if (!isUndefined(from._strict)) {
        to._strict = from._strict;
    }
    if (!isUndefined(from._tzm)) {
        to._tzm = from._tzm;
    }
    if (!isUndefined(from._isUTC)) {
        to._isUTC = from._isUTC;
    }
    if (!isUndefined(from._offset)) {
        to._offset = from._offset;
    }
    if (!isUndefined(from._pf)) {
        to._pf = getParsingFlags(from);
    }
    if (!isUndefined(from._locale)) {
        to._locale = from._locale;
    }

    if (momentProperties.length > 0) {
        for (i = 0; i < momentProperties.length; i++) {
            prop = momentProperties[i];
            val = from[prop];
            if (!isUndefined(val)) {
                to[prop] = val;
            }
        }
    }

    return to;
}

// Moment prototype object
function Moment(config) {
    copyConfig(this, config);
    this._d = new Date(config._d != null ? config._d.getTime() : NaN);
    if (!this.isValid()) {
        this._d = new Date(NaN);
    }
    // Prevent infinite loop in case updateOffset creates new moment
    // objects.
    if (updateInProgress === false) {
        updateInProgress = true;
        hooks.updateOffset(this);
        updateInProgress = false;
    }
}

function isMoment(obj) {
    return (
        obj instanceof Moment || (obj != null && obj._isAMomentObject != null)
    );
}

function warn(msg) {
    if (
        hooks.suppressDeprecationWarnings === false &&
        typeof console !== 'undefined' &&
        console.warn
    ) {
        console.warn('Deprecation warning: ' + msg);
    }
}

function deprecate(msg, fn) {
    var firstTime = true;

    return extend(function () {
        if (hooks.deprecationHandler != null) {
            hooks.deprecationHandler(null, msg);
        }
        if (firstTime) {
            var args = [],
                arg,
                i,
                key;
            for (i = 0; i < arguments.length; i++) {
                arg = '';
                if (typeof arguments[i] === 'object') {
                    arg += '\n[' + i + '] ';
                    for (key in arguments[0]) {
                        if (hasOwnProp(arguments[0], key)) {
                            arg += key + ': ' + arguments[0][key] + ', ';
                        }
                    }
                    arg = arg.slice(0, -2); // Remove trailing comma and space
                } else {
                    arg = arguments[i];
                }
                args.push(arg);
            }
            warn(
                msg +
                    '\nArguments: ' +
                    Array.prototype.slice.call(args).join('') +
                    '\n' +
                    new Error().stack
            );
            firstTime = false;
        }
        return fn.apply(this, arguments);
    }, fn);
}

var deprecations = {};

function deprecateSimple(name, msg) {
    if (hooks.deprecationHandler != null) {
        hooks.deprecationHandler(name, msg);
    }
    if (!deprecations[name]) {
        warn(msg);
        deprecations[name] = true;
    }
}

hooks.suppressDeprecationWarnings = false;
hooks.deprecationHandler = null;

function isFunction(input) {
    return (
        (typeof Function !== 'undefined' && input instanceof Function) ||
        Object.prototype.toString.call(input) === '[object Function]'
    );
}

function set(config) {
    var prop, i;
    for (i in config) {
        if (hasOwnProp(config, i)) {
            prop = config[i];
            if (isFunction(prop)) {
                this[i] = prop;
            } else {
                this['_' + i] = prop;
            }
        }
    }
    this._config = config;
    // Lenient ordinal parsing accepts just a number in addition to
    // number + (possibly) stuff coming from _dayOfMonthOrdinalParse.
    // TODO: Remove "ordinalParse" fallback in next major release.
    this._dayOfMonthOrdinalParseLenient = new RegExp(
        (this._dayOfMonthOrdinalParse.source || this._ordinalParse.source) +
            '|' +
            /\d{1,2}/.source
    );
}

function mergeConfigs(parentConfig, childConfig) {
    var res = extend({}, parentConfig),
        prop;
    for (prop in childConfig) {
        if (hasOwnProp(childConfig, prop)) {
            if (isObject(parentConfig[prop]) && isObject(childConfig[prop])) {
                res[prop] = {};
                extend(res[prop], parentConfig[prop]);
                extend(res[prop], childConfig[prop]);
            } else if (childConfig[prop] != null) {
                res[prop] = childConfig[prop];
            } else {
                delete res[prop];
            }
        }
    }
    for (prop in parentConfig) {
        if (
            hasOwnProp(parentConfig, prop) &&
            !hasOwnProp(childConfig, prop) &&
            isObject(parentConfig[prop])
        ) {
            // make sure changes to properties don't modify parent config
            res[prop] = extend({}, res[prop]);
        }
    }
    return res;
}

function Locale(config) {
    if (config != null) {
        this.set(config);
    }
}

var keys;

if (Object.keys) {
    keys = Object.keys;
} else {
    keys = function (obj) {
        var i,
            res = [];
        for (i in obj) {
            if (hasOwnProp(obj, i)) {
                res.push(i);
            }
        }
        return res;
    };
}

var defaultCalendar = {
    sameDay: '[Today at] LT',
    nextDay: '[Tomorrow at] LT',
    nextWeek: 'dddd [at] LT',
    lastDay: '[Yesterday at] LT',
    lastWeek: '[Last] dddd [at] LT',
    sameElse: 'L',
};

function calendar(key, mom, now) {
    var output = this._calendar[key] || this._calendar['sameElse'];
    return isFunction(output) ? output.call(mom, now) : output;
}

function zeroFill(number, targetLength, forceSign) {
    var absNumber = '' + Math.abs(number),
        zerosToFill = targetLength - absNumber.length,
        sign = number >= 0;
    return (
        (sign ? (forceSign ? '+' : '') : '-') +
        Math.pow(10, Math.max(0, zerosToFill)).toString().substr(1) +
        absNumber
    );
}

var formattingTokens = /(\[[^\[]*\])|(\\)?([Hh]mm(ss)?|Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|Qo?|N{1,5}|YYYYYY|YYYYY|YYYY|YY|y{2,4}|yo?|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|kk?|mm?|ss?|S{1,9}|x|X|zz?|ZZ?|.)/g,
    localFormattingTokens = /(\[[^\[]*\])|(\\)?(LTS|LT|LL?L?L?|l{1,4})/g,
    formatFunctions = {},
    formatTokenFunctions = {};

// token:    'M'
// padded:   ['MM', 2]
// ordinal:  'Mo'
// callback: function () { this.month() + 1 }
function addFormatToken(token, padded, ordinal, callback) {
    var func = callback;
    if (typeof callback === 'string') {
        func = function () {
            return this[callback]();
        };
    }
    if (token) {
        formatTokenFunctions[token] = func;
    }
    if (padded) {
        formatTokenFunctions[padded[0]] = function () {
            return zeroFill(func.apply(this, arguments), padded[1], padded[2]);
        };
    }
    if (ordinal) {
        formatTokenFunctions[ordinal] = function () {
            return this.localeData().ordinal(
                func.apply(this, arguments),
                token
            );
        };
    }
}

function removeFormattingTokens(input) {
    if (input.match(/\[[\s\S]/)) {
        return input.replace(/^\[|\]$/g, '');
    }
    return input.replace(/\\/g, '');
}

function makeFormatFunction(format) {
    var array = format.match(formattingTokens),
        i,
        length;

    for (i = 0, length = array.length; i < length; i++) {
        if (formatTokenFunctions[array[i]]) {
            array[i] = formatTokenFunctions[array[i]];
        } else {
            array[i] = removeFormattingTokens(array[i]);
        }
    }

    return function (mom) {
        var output = '',
            i;
        for (i = 0; i < length; i++) {
            output += isFunction(array[i])
                ? array[i].call(mom, format)
                : array[i];
        }
        return output;
    };
}

// format date using native date object
function formatMoment(m, format) {
    if (!m.isValid()) {
        return m.localeData().invalidDate();
    }

    format = expandFormat(format, m.localeData());
    formatFunctions[format] =
        formatFunctions[format] || makeFormatFunction(format);

    return formatFunctions[format](m);
}

function expandFormat(format, locale) {
    var i = 5;

    function replaceLongDateFormatTokens(input) {
        return locale.longDateFormat(input) || input;
    }

    localFormattingTokens.lastIndex = 0;
    while (i >= 0 && localFormattingTokens.test(format)) {
        format = format.replace(
            localFormattingTokens,
            replaceLongDateFormatTokens
        );
        localFormattingTokens.lastIndex = 0;
        i -= 1;
    }

    return format;
}

var defaultLongDateFormat = {
    LTS: 'h:mm:ss A',
    LT: 'h:mm A',
    L: 'MM/DD/YYYY',
    LL: 'MMMM D, YYYY',
    LLL: 'MMMM D, YYYY h:mm A',
    LLLL: 'dddd, MMMM D, YYYY h:mm A',
};

function longDateFormat(key) {
    var format = this._longDateFormat[key],
        formatUpper = this._longDateFormat[key.toUpperCase()];

    if (format || !formatUpper) {
        return format;
    }

    this._longDateFormat[key] = formatUpper
        .match(formattingTokens)
        .map(function (tok) {
            if (
                tok === 'MMMM' ||
                tok === 'MM' ||
                tok === 'DD' ||
                tok === 'dddd'
            ) {
                return tok.slice(1);
            }
            return tok;
        })
        .join('');

    return this._longDateFormat[key];
}

var defaultInvalidDate = 'Invalid date';

function invalidDate() {
    return this._invalidDate;
}

var defaultOrdinal = '%d',
    defaultDayOfMonthOrdinalParse = /\d{1,2}/;

function ordinal(number) {
    return this._ordinal.replace('%d', number);
}

var defaultRelativeTime = {
    future: 'in %s',
    past: '%s ago',
    s: 'a few seconds',
    ss: '%d seconds',
    m: 'a minute',
    mm: '%d minutes',
    h: 'an hour',
    hh: '%d hours',
    d: 'a day',
    dd: '%d days',
    w: 'a week',
    ww: '%d weeks',
    M: 'a month',
    MM: '%d months',
    y: 'a year',
    yy: '%d years',
};

function relativeTime(number, withoutSuffix, string, isFuture) {
    var output = this._relativeTime[string];
    return isFunction(output)
        ? output(number, withoutSuffix, string, isFuture)
        : output.replace(/%d/i, number);
}

function pastFuture(diff, output) {
    var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
    return isFunction(format) ? format(output) : format.replace(/%s/i, output);
}

var aliases = {};

function addUnitAlias(unit, shorthand) {
    var lowerCase = unit.toLowerCase();
    aliases[lowerCase] = aliases[lowerCase + 's'] = aliases[shorthand] = unit;
}

function normalizeUnits(units) {
    return typeof units === 'string'
        ? aliases[units] || aliases[units.toLowerCase()]
        : undefined;
}

function normalizeObjectUnits(inputObject) {
    var normalizedInput = {},
        normalizedProp,
        prop;

    for (prop in inputObject) {
        if (hasOwnProp(inputObject, prop)) {
            normalizedProp = normalizeUnits(prop);
            if (normalizedProp) {
                normalizedInput[normalizedProp] = inputObject[prop];
            }
        }
    }

    return normalizedInput;
}

var priorities = {};

function addUnitPriority(unit, priority) {
    priorities[unit] = priority;
}

function getPrioritizedUnits(unitsObj) {
    var units = [],
        u;
    for (u in unitsObj) {
        if (hasOwnProp(unitsObj, u)) {
            units.push({ unit: u, priority: priorities[u] });
        }
    }
    units.sort(function (a, b) {
        return a.priority - b.priority;
    });
    return units;
}

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

function absFloor(number) {
    if (number < 0) {
        // -0 -> 0
        return Math.ceil(number) || 0;
    } else {
        return Math.floor(number);
    }
}

function toInt(argumentForCoercion) {
    var coercedNumber = +argumentForCoercion,
        value = 0;

    if (coercedNumber !== 0 && isFinite(coercedNumber)) {
        value = absFloor(coercedNumber);
    }

    return value;
}

function makeGetSet(unit, keepTime) {
    return function (value) {
        if (value != null) {
            set$1(this, unit, value);
            hooks.updateOffset(this, keepTime);
            return this;
        } else {
            return get(this, unit);
        }
    };
}

function get(mom, unit) {
    return mom.isValid()
        ? mom._d['get' + (mom._isUTC ? 'UTC' : '') + unit]()
        : NaN;
}

function set$1(mom, unit, value) {
    if (mom.isValid() && !isNaN(value)) {
        if (
            unit === 'FullYear' &&
            isLeapYear(mom.year()) &&
            mom.month() === 1 &&
            mom.date() === 29
        ) {
            value = toInt(value);
            mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](
                value,
                mom.month(),
                daysInMonth(value, mom.month())
            );
        } else {
            mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](value);
        }
    }
}

// MOMENTS

function stringGet(units) {
    units = normalizeUnits(units);
    if (isFunction(this[units])) {
        return this[units]();
    }
    return this;
}

function stringSet(units, value) {
    if (typeof units === 'object') {
        units = normalizeObjectUnits(units);
        var prioritized = getPrioritizedUnits(units),
            i;
        for (i = 0; i < prioritized.length; i++) {
            this[prioritized[i].unit](units[prioritized[i].unit]);
        }
    } else {
        units = normalizeUnits(units);
        if (isFunction(this[units])) {
            return this[units](value);
        }
    }
    return this;
}

var match1 = /\d/, //       0 - 9
    match2 = /\d\d/, //      00 - 99
    match3 = /\d{3}/, //     000 - 999
    match4 = /\d{4}/, //    0000 - 9999
    match6 = /[+-]?\d{6}/, // -999999 - 999999
    match1to2 = /\d\d?/, //       0 - 99
    match3to4 = /\d\d\d\d?/, //     999 - 9999
    match5to6 = /\d\d\d\d\d\d?/, //   99999 - 999999
    match1to3 = /\d{1,3}/, //       0 - 999
    match1to4 = /\d{1,4}/, //       0 - 9999
    match1to6 = /[+-]?\d{1,6}/, // -999999 - 999999
    matchUnsigned = /\d+/, //       0 - inf
    matchSigned = /[+-]?\d+/, //    -inf - inf
    matchOffset = /Z|[+-]\d\d:?\d\d/gi, // +00:00 -00:00 +0000 -0000 or Z
    matchShortOffset = /Z|[+-]\d\d(?::?\d\d)?/gi, // +00 -00 +00:00 -00:00 +0000 -0000 or Z
    matchTimestamp = /[+-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123
    // any word (or two) characters or numbers including two/three word month in arabic.
    // includes scottish gaelic two word and hyphenated months
    matchWord = /[0-9]{0,256}['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFF07\uFF10-\uFFEF]{1,256}|[\u0600-\u06FF\/]{1,256}(\s*?[\u0600-\u06FF]{1,256}){1,2}/i,
    regexes;

regexes = {};

function addRegexToken(token, regex, strictRegex) {
    regexes[token] = isFunction(regex)
        ? regex
        : function (isStrict, localeData) {
              return isStrict && strictRegex ? strictRegex : regex;
          };
}

function getParseRegexForToken(token, config) {
    if (!hasOwnProp(regexes, token)) {
        return new RegExp(unescapeFormat(token));
    }

    return regexes[token](config._strict, config._locale);
}

// Code from http://stackoverflow.com/questions/3561493/is-there-a-regexp-escape-function-in-javascript
function unescapeFormat(s) {
    return regexEscape(
        s
            .replace('\\', '')
            .replace(/\\(\[)|\\(\])|\[([^\]\[]*)\]|\\(.)/g, function (
                matched,
                p1,
                p2,
                p3,
                p4
            ) {
                return p1 || p2 || p3 || p4;
            })
    );
}

function regexEscape(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}

var tokens = {};

function addParseToken(token, callback) {
    var i,
        func = callback;
    if (typeof token === 'string') {
        token = [token];
    }
    if (isNumber(callback)) {
        func = function (input, array) {
            array[callback] = toInt(input);
        };
    }
    for (i = 0; i < token.length; i++) {
        tokens[token[i]] = func;
    }
}

function addWeekParseToken(token, callback) {
    addParseToken(token, function (input, array, config, token) {
        config._w = config._w || {};
        callback(input, config._w, config, token);
    });
}

function addTimeToArrayFromToken(token, input, config) {
    if (input != null && hasOwnProp(tokens, token)) {
        tokens[token](input, config._a, config, token);
    }
}

var YEAR = 0,
    MONTH = 1,
    DATE = 2,
    HOUR = 3,
    MINUTE = 4,
    SECOND = 5,
    MILLISECOND = 6,
    WEEK = 7,
    WEEKDAY = 8;

function mod(n, x) {
    return ((n % x) + x) % x;
}

var indexOf;

if (Array.prototype.indexOf) {
    indexOf = Array.prototype.indexOf;
} else {
    indexOf = function (o) {
        // I know
        var i;
        for (i = 0; i < this.length; ++i) {
            if (this[i] === o) {
                return i;
            }
        }
        return -1;
    };
}

function daysInMonth(year, month) {
    if (isNaN(year) || isNaN(month)) {
        return NaN;
    }
    var modMonth = mod(month, 12);
    year += (month - modMonth) / 12;
    return modMonth === 1
        ? isLeapYear(year)
            ? 29
            : 28
        : 31 - ((modMonth % 7) % 2);
}

// FORMATTING

addFormatToken('M', ['MM', 2], 'Mo', function () {
    return this.month() + 1;
});

addFormatToken('MMM', 0, 0, function (format) {
    return this.localeData().monthsShort(this, format);
});

addFormatToken('MMMM', 0, 0, function (format) {
    return this.localeData().months(this, format);
});

// ALIASES

addUnitAlias('month', 'M');

// PRIORITY

addUnitPriority('month', 8);

// PARSING

addRegexToken('M', match1to2);
addRegexToken('MM', match1to2, match2);
addRegexToken('MMM', function (isStrict, locale) {
    return locale.monthsShortRegex(isStrict);
});
addRegexToken('MMMM', function (isStrict, locale) {
    return locale.monthsRegex(isStrict);
});

addParseToken(['M', 'MM'], function (input, array) {
    array[MONTH] = toInt(input) - 1;
});

addParseToken(['MMM', 'MMMM'], function (input, array, config, token) {
    var month = config._locale.monthsParse(input, token, config._strict);
    // if we didn't find a month name, mark the date as invalid.
    if (month != null) {
        array[MONTH] = month;
    } else {
        getParsingFlags(config).invalidMonth = input;
    }
});

// LOCALES

var defaultLocaleMonths = 'January_February_March_April_May_June_July_August_September_October_November_December'.split(
        '_'
    ),
    defaultLocaleMonthsShort = 'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split(
        '_'
    ),
    MONTHS_IN_FORMAT = /D[oD]?(\[[^\[\]]*\]|\s)+MMMM?/,
    defaultMonthsShortRegex = matchWord,
    defaultMonthsRegex = matchWord;

function localeMonths(m, format) {
    if (!m) {
        return isArray(this._months)
            ? this._months
            : this._months['standalone'];
    }
    return isArray(this._months)
        ? this._months[m.month()]
        : this._months[
              (this._months.isFormat || MONTHS_IN_FORMAT).test(format)
                  ? 'format'
                  : 'standalone'
          ][m.month()];
}

function localeMonthsShort(m, format) {
    if (!m) {
        return isArray(this._monthsShort)
            ? this._monthsShort
            : this._monthsShort['standalone'];
    }
    return isArray(this._monthsShort)
        ? this._monthsShort[m.month()]
        : this._monthsShort[
              MONTHS_IN_FORMAT.test(format) ? 'format' : 'standalone'
          ][m.month()];
}

function handleStrictParse(monthName, format, strict) {
    var i,
        ii,
        mom,
        llc = monthName.toLocaleLowerCase();
    if (!this._monthsParse) {
        // this is not used
        this._monthsParse = [];
        this._longMonthsParse = [];
        this._shortMonthsParse = [];
        for (i = 0; i < 12; ++i) {
            mom = createUTC([2000, i]);
            this._shortMonthsParse[i] = this.monthsShort(
                mom,
                ''
            ).toLocaleLowerCase();
            this._longMonthsParse[i] = this.months(mom, '').toLocaleLowerCase();
        }
    }

    if (strict) {
        if (format === 'MMM') {
            ii = indexOf.call(this._shortMonthsParse, llc);
            return ii !== -1 ? ii : null;
        } else {
            ii = indexOf.call(this._longMonthsParse, llc);
            return ii !== -1 ? ii : null;
        }
    } else {
        if (format === 'MMM') {
            ii = indexOf.call(this._shortMonthsParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._longMonthsParse, llc);
            return ii !== -1 ? ii : null;
        } else {
            ii = indexOf.call(this._longMonthsParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._shortMonthsParse, llc);
            return ii !== -1 ? ii : null;
        }
    }
}

function localeMonthsParse(monthName, format, strict) {
    var i, mom, regex;

    if (this._monthsParseExact) {
        return handleStrictParse.call(this, monthName, format, strict);
    }

    if (!this._monthsParse) {
        this._monthsParse = [];
        this._longMonthsParse = [];
        this._shortMonthsParse = [];
    }

    // TODO: add sorting
    // Sorting makes sure if one month (or abbr) is a prefix of another
    // see sorting in computeMonthsParse
    for (i = 0; i < 12; i++) {
        // make the regex if we don't have it already
        mom = createUTC([2000, i]);
        if (strict && !this._longMonthsParse[i]) {
            this._longMonthsParse[i] = new RegExp(
                '^' + this.months(mom, '').replace('.', '') + '$',
                'i'
            );
            this._shortMonthsParse[i] = new RegExp(
                '^' + this.monthsShort(mom, '').replace('.', '') + '$',
                'i'
            );
        }
        if (!strict && !this._monthsParse[i]) {
            regex =
                '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
            this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
        }
        // test the regex
        if (
            strict &&
            format === 'MMMM' &&
            this._longMonthsParse[i].test(monthName)
        ) {
            return i;
        } else if (
            strict &&
            format === 'MMM' &&
            this._shortMonthsParse[i].test(monthName)
        ) {
            return i;
        } else if (!strict && this._monthsParse[i].test(monthName)) {
            return i;
        }
    }
}

// MOMENTS

function setMonth(mom, value) {
    var dayOfMonth;

    if (!mom.isValid()) {
        // No op
        return mom;
    }

    if (typeof value === 'string') {
        if (/^\d+$/.test(value)) {
            value = toInt(value);
        } else {
            value = mom.localeData().monthsParse(value);
            // TODO: Another silent failure?
            if (!isNumber(value)) {
                return mom;
            }
        }
    }

    dayOfMonth = Math.min(mom.date(), daysInMonth(mom.year(), value));
    mom._d['set' + (mom._isUTC ? 'UTC' : '') + 'Month'](value, dayOfMonth);
    return mom;
}

function getSetMonth(value) {
    if (value != null) {
        setMonth(this, value);
        hooks.updateOffset(this, true);
        return this;
    } else {
        return get(this, 'Month');
    }
}

function getDaysInMonth() {
    return daysInMonth(this.year(), this.month());
}

function monthsShortRegex(isStrict) {
    if (this._monthsParseExact) {
        if (!hasOwnProp(this, '_monthsRegex')) {
            computeMonthsParse.call(this);
        }
        if (isStrict) {
            return this._monthsShortStrictRegex;
        } else {
            return this._monthsShortRegex;
        }
    } else {
        if (!hasOwnProp(this, '_monthsShortRegex')) {
            this._monthsShortRegex = defaultMonthsShortRegex;
        }
        return this._monthsShortStrictRegex && isStrict
            ? this._monthsShortStrictRegex
            : this._monthsShortRegex;
    }
}

function monthsRegex(isStrict) {
    if (this._monthsParseExact) {
        if (!hasOwnProp(this, '_monthsRegex')) {
            computeMonthsParse.call(this);
        }
        if (isStrict) {
            return this._monthsStrictRegex;
        } else {
            return this._monthsRegex;
        }
    } else {
        if (!hasOwnProp(this, '_monthsRegex')) {
            this._monthsRegex = defaultMonthsRegex;
        }
        return this._monthsStrictRegex && isStrict
            ? this._monthsStrictRegex
            : this._monthsRegex;
    }
}

function computeMonthsParse() {
    function cmpLenRev(a, b) {
        return b.length - a.length;
    }

    var shortPieces = [],
        longPieces = [],
        mixedPieces = [],
        i,
        mom;
    for (i = 0; i < 12; i++) {
        // make the regex if we don't have it already
        mom = createUTC([2000, i]);
        shortPieces.push(this.monthsShort(mom, ''));
        longPieces.push(this.months(mom, ''));
        mixedPieces.push(this.months(mom, ''));
        mixedPieces.push(this.monthsShort(mom, ''));
    }
    // Sorting makes sure if one month (or abbr) is a prefix of another it
    // will match the longer piece.
    shortPieces.sort(cmpLenRev);
    longPieces.sort(cmpLenRev);
    mixedPieces.sort(cmpLenRev);
    for (i = 0; i < 12; i++) {
        shortPieces[i] = regexEscape(shortPieces[i]);
        longPieces[i] = regexEscape(longPieces[i]);
    }
    for (i = 0; i < 24; i++) {
        mixedPieces[i] = regexEscape(mixedPieces[i]);
    }

    this._monthsRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
    this._monthsShortRegex = this._monthsRegex;
    this._monthsStrictRegex = new RegExp(
        '^(' + longPieces.join('|') + ')',
        'i'
    );
    this._monthsShortStrictRegex = new RegExp(
        '^(' + shortPieces.join('|') + ')',
        'i'
    );
}

// FORMATTING

addFormatToken('Y', 0, 0, function () {
    var y = this.year();
    return y <= 9999 ? zeroFill(y, 4) : '+' + y;
});

addFormatToken(0, ['YY', 2], 0, function () {
    return this.year() % 100;
});

addFormatToken(0, ['YYYY', 4], 0, 'year');
addFormatToken(0, ['YYYYY', 5], 0, 'year');
addFormatToken(0, ['YYYYYY', 6, true], 0, 'year');

// ALIASES

addUnitAlias('year', 'y');

// PRIORITIES

addUnitPriority('year', 1);

// PARSING

addRegexToken('Y', matchSigned);
addRegexToken('YY', match1to2, match2);
addRegexToken('YYYY', match1to4, match4);
addRegexToken('YYYYY', match1to6, match6);
addRegexToken('YYYYYY', match1to6, match6);

addParseToken(['YYYYY', 'YYYYYY'], YEAR);
addParseToken('YYYY', function (input, array) {
    array[YEAR] =
        input.length === 2 ? hooks.parseTwoDigitYear(input) : toInt(input);
});
addParseToken('YY', function (input, array) {
    array[YEAR] = hooks.parseTwoDigitYear(input);
});
addParseToken('Y', function (input, array) {
    array[YEAR] = parseInt(input, 10);
});

// HELPERS

function daysInYear(year) {
    return isLeapYear(year) ? 366 : 365;
}

// HOOKS

hooks.parseTwoDigitYear = function (input) {
    return toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
};

// MOMENTS

var getSetYear = makeGetSet('FullYear', true);

function getIsLeapYear() {
    return isLeapYear(this.year());
}

function createDate(y, m, d, h, M, s, ms) {
    // can't just apply() to create a date:
    // https://stackoverflow.com/q/181348
    var date;
    // the date constructor remaps years 0-99 to 1900-1999
    if (y < 100 && y >= 0) {
        // preserve leap years using a full 400 year cycle, then reset
        date = new Date(y + 400, m, d, h, M, s, ms);
        if (isFinite(date.getFullYear())) {
            date.setFullYear(y);
        }
    } else {
        date = new Date(y, m, d, h, M, s, ms);
    }

    return date;
}

function createUTCDate(y) {
    var date, args;
    // the Date.UTC function remaps years 0-99 to 1900-1999
    if (y < 100 && y >= 0) {
        args = Array.prototype.slice.call(arguments);
        // preserve leap years using a full 400 year cycle, then reset
        args[0] = y + 400;
        date = new Date(Date.UTC.apply(null, args));
        if (isFinite(date.getUTCFullYear())) {
            date.setUTCFullYear(y);
        }
    } else {
        date = new Date(Date.UTC.apply(null, arguments));
    }

    return date;
}

// start-of-first-week - start-of-year
function firstWeekOffset(year, dow, doy) {
    var // first-week day -- which january is always in the first week (4 for iso, 1 for other)
        fwd = 7 + dow - doy,
        // first-week day local weekday -- which local weekday is fwd
        fwdlw = (7 + createUTCDate(year, 0, fwd).getUTCDay() - dow) % 7;

    return -fwdlw + fwd - 1;
}

// https://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
function dayOfYearFromWeeks(year, week, weekday, dow, doy) {
    var localWeekday = (7 + weekday - dow) % 7,
        weekOffset = firstWeekOffset(year, dow, doy),
        dayOfYear = 1 + 7 * (week - 1) + localWeekday + weekOffset,
        resYear,
        resDayOfYear;

    if (dayOfYear <= 0) {
        resYear = year - 1;
        resDayOfYear = daysInYear(resYear) + dayOfYear;
    } else if (dayOfYear > daysInYear(year)) {
        resYear = year + 1;
        resDayOfYear = dayOfYear - daysInYear(year);
    } else {
        resYear = year;
        resDayOfYear = dayOfYear;
    }

    return {
        year: resYear,
        dayOfYear: resDayOfYear,
    };
}

function weekOfYear(mom, dow, doy) {
    var weekOffset = firstWeekOffset(mom.year(), dow, doy),
        week = Math.floor((mom.dayOfYear() - weekOffset - 1) / 7) + 1,
        resWeek,
        resYear;

    if (week < 1) {
        resYear = mom.year() - 1;
        resWeek = week + weeksInYear(resYear, dow, doy);
    } else if (week > weeksInYear(mom.year(), dow, doy)) {
        resWeek = week - weeksInYear(mom.year(), dow, doy);
        resYear = mom.year() + 1;
    } else {
        resYear = mom.year();
        resWeek = week;
    }

    return {
        week: resWeek,
        year: resYear,
    };
}

function weeksInYear(year, dow, doy) {
    var weekOffset = firstWeekOffset(year, dow, doy),
        weekOffsetNext = firstWeekOffset(year + 1, dow, doy);
    return (daysInYear(year) - weekOffset + weekOffsetNext) / 7;
}

// FORMATTING

addFormatToken('w', ['ww', 2], 'wo', 'week');
addFormatToken('W', ['WW', 2], 'Wo', 'isoWeek');

// ALIASES

addUnitAlias('week', 'w');
addUnitAlias('isoWeek', 'W');

// PRIORITIES

addUnitPriority('week', 5);
addUnitPriority('isoWeek', 5);

// PARSING

addRegexToken('w', match1to2);
addRegexToken('ww', match1to2, match2);
addRegexToken('W', match1to2);
addRegexToken('WW', match1to2, match2);

addWeekParseToken(['w', 'ww', 'W', 'WW'], function (
    input,
    week,
    config,
    token
) {
    week[token.substr(0, 1)] = toInt(input);
});

// HELPERS

// LOCALES

function localeWeek(mom) {
    return weekOfYear(mom, this._week.dow, this._week.doy).week;
}

var defaultLocaleWeek = {
    dow: 0, // Sunday is the first day of the week.
    doy: 6, // The week that contains Jan 6th is the first week of the year.
};

function localeFirstDayOfWeek() {
    return this._week.dow;
}

function localeFirstDayOfYear() {
    return this._week.doy;
}

// MOMENTS

function getSetWeek(input) {
    var week = this.localeData().week(this);
    return input == null ? week : this.add((input - week) * 7, 'd');
}

function getSetISOWeek(input) {
    var week = weekOfYear(this, 1, 4).week;
    return input == null ? week : this.add((input - week) * 7, 'd');
}

// FORMATTING

addFormatToken('d', 0, 'do', 'day');

addFormatToken('dd', 0, 0, function (format) {
    return this.localeData().weekdaysMin(this, format);
});

addFormatToken('ddd', 0, 0, function (format) {
    return this.localeData().weekdaysShort(this, format);
});

addFormatToken('dddd', 0, 0, function (format) {
    return this.localeData().weekdays(this, format);
});

addFormatToken('e', 0, 0, 'weekday');
addFormatToken('E', 0, 0, 'isoWeekday');

// ALIASES

addUnitAlias('day', 'd');
addUnitAlias('weekday', 'e');
addUnitAlias('isoWeekday', 'E');

// PRIORITY
addUnitPriority('day', 11);
addUnitPriority('weekday', 11);
addUnitPriority('isoWeekday', 11);

// PARSING

addRegexToken('d', match1to2);
addRegexToken('e', match1to2);
addRegexToken('E', match1to2);
addRegexToken('dd', function (isStrict, locale) {
    return locale.weekdaysMinRegex(isStrict);
});
addRegexToken('ddd', function (isStrict, locale) {
    return locale.weekdaysShortRegex(isStrict);
});
addRegexToken('dddd', function (isStrict, locale) {
    return locale.weekdaysRegex(isStrict);
});

addWeekParseToken(['dd', 'ddd', 'dddd'], function (input, week, config, token) {
    var weekday = config._locale.weekdaysParse(input, token, config._strict);
    // if we didn't get a weekday name, mark the date as invalid
    if (weekday != null) {
        week.d = weekday;
    } else {
        getParsingFlags(config).invalidWeekday = input;
    }
});

addWeekParseToken(['d', 'e', 'E'], function (input, week, config, token) {
    week[token] = toInt(input);
});

// HELPERS

function parseWeekday(input, locale) {
    if (typeof input !== 'string') {
        return input;
    }

    if (!isNaN(input)) {
        return parseInt(input, 10);
    }

    input = locale.weekdaysParse(input);
    if (typeof input === 'number') {
        return input;
    }

    return null;
}

function parseIsoWeekday(input, locale) {
    if (typeof input === 'string') {
        return locale.weekdaysParse(input) % 7 || 7;
    }
    return isNaN(input) ? null : input;
}

// LOCALES
function shiftWeekdays(ws, n) {
    return ws.slice(n, 7).concat(ws.slice(0, n));
}

var defaultLocaleWeekdays = 'Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday'.split(
        '_'
    ),
    defaultLocaleWeekdaysShort = 'Sun_Mon_Tue_Wed_Thu_Fri_Sat'.split('_'),
    defaultLocaleWeekdaysMin = 'Su_Mo_Tu_We_Th_Fr_Sa'.split('_'),
    defaultWeekdaysRegex = matchWord,
    defaultWeekdaysShortRegex = matchWord,
    defaultWeekdaysMinRegex = matchWord;

function localeWeekdays(m, format) {
    var weekdays = isArray(this._weekdays)
        ? this._weekdays
        : this._weekdays[
              m && m !== true && this._weekdays.isFormat.test(format)
                  ? 'format'
                  : 'standalone'
          ];
    return m === true
        ? shiftWeekdays(weekdays, this._week.dow)
        : m
        ? weekdays[m.day()]
        : weekdays;
}

function localeWeekdaysShort(m) {
    return m === true
        ? shiftWeekdays(this._weekdaysShort, this._week.dow)
        : m
        ? this._weekdaysShort[m.day()]
        : this._weekdaysShort;
}

function localeWeekdaysMin(m) {
    return m === true
        ? shiftWeekdays(this._weekdaysMin, this._week.dow)
        : m
        ? this._weekdaysMin[m.day()]
        : this._weekdaysMin;
}

function handleStrictParse$1(weekdayName, format, strict) {
    var i,
        ii,
        mom,
        llc = weekdayName.toLocaleLowerCase();
    if (!this._weekdaysParse) {
        this._weekdaysParse = [];
        this._shortWeekdaysParse = [];
        this._minWeekdaysParse = [];

        for (i = 0; i < 7; ++i) {
            mom = createUTC([2000, 1]).day(i);
            this._minWeekdaysParse[i] = this.weekdaysMin(
                mom,
                ''
            ).toLocaleLowerCase();
            this._shortWeekdaysParse[i] = this.weekdaysShort(
                mom,
                ''
            ).toLocaleLowerCase();
            this._weekdaysParse[i] = this.weekdays(mom, '').toLocaleLowerCase();
        }
    }

    if (strict) {
        if (format === 'dddd') {
            ii = indexOf.call(this._weekdaysParse, llc);
            return ii !== -1 ? ii : null;
        } else if (format === 'ddd') {
            ii = indexOf.call(this._shortWeekdaysParse, llc);
            return ii !== -1 ? ii : null;
        } else {
            ii = indexOf.call(this._minWeekdaysParse, llc);
            return ii !== -1 ? ii : null;
        }
    } else {
        if (format === 'dddd') {
            ii = indexOf.call(this._weekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._shortWeekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._minWeekdaysParse, llc);
            return ii !== -1 ? ii : null;
        } else if (format === 'ddd') {
            ii = indexOf.call(this._shortWeekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._weekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._minWeekdaysParse, llc);
            return ii !== -1 ? ii : null;
        } else {
            ii = indexOf.call(this._minWeekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._weekdaysParse, llc);
            if (ii !== -1) {
                return ii;
            }
            ii = indexOf.call(this._shortWeekdaysParse, llc);
            return ii !== -1 ? ii : null;
        }
    }
}

function localeWeekdaysParse(weekdayName, format, strict) {
    var i, mom, regex;

    if (this._weekdaysParseExact) {
        return handleStrictParse$1.call(this, weekdayName, format, strict);
    }

    if (!this._weekdaysParse) {
        this._weekdaysParse = [];
        this._minWeekdaysParse = [];
        this._shortWeekdaysParse = [];
        this._fullWeekdaysParse = [];
    }

    for (i = 0; i < 7; i++) {
        // make the regex if we don't have it already

        mom = createUTC([2000, 1]).day(i);
        if (strict && !this._fullWeekdaysParse[i]) {
            this._fullWeekdaysParse[i] = new RegExp(
                '^' + this.weekdays(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
            this._shortWeekdaysParse[i] = new RegExp(
                '^' + this.weekdaysShort(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
            this._minWeekdaysParse[i] = new RegExp(
                '^' + this.weekdaysMin(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
        }
        if (!this._weekdaysParse[i]) {
            regex =
                '^' +
                this.weekdays(mom, '') +
                '|^' +
                this.weekdaysShort(mom, '') +
                '|^' +
                this.weekdaysMin(mom, '');
            this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
        }
        // test the regex
        if (
            strict &&
            format === 'dddd' &&
            this._fullWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (
            strict &&
            format === 'ddd' &&
            this._shortWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (
            strict &&
            format === 'dd' &&
            this._minWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (!strict && this._weekdaysParse[i].test(weekdayName)) {
            return i;
        }
    }
}

// MOMENTS

function getSetDayOfWeek(input) {
    if (!this.isValid()) {
        return input != null ? this : NaN;
    }
    var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
    if (input != null) {
        input = parseWeekday(input, this.localeData());
        return this.add(input - day, 'd');
    } else {
        return day;
    }
}

function getSetLocaleDayOfWeek(input) {
    if (!this.isValid()) {
        return input != null ? this : NaN;
    }
    var weekday = (this.day() + 7 - this.localeData()._week.dow) % 7;
    return input == null ? weekday : this.add(input - weekday, 'd');
}

function getSetISODayOfWeek(input) {
    if (!this.isValid()) {
        return input != null ? this : NaN;
    }

    // behaves the same as moment#day except
    // as a getter, returns 7 instead of 0 (1-7 range instead of 0-6)
    // as a setter, sunday should belong to the previous week.

    if (input != null) {
        var weekday = parseIsoWeekday(input, this.localeData());
        return this.day(this.day() % 7 ? weekday : weekday - 7);
    } else {
        return this.day() || 7;
    }
}

function weekdaysRegex(isStrict) {
    if (this._weekdaysParseExact) {
        if (!hasOwnProp(this, '_weekdaysRegex')) {
            computeWeekdaysParse.call(this);
        }
        if (isStrict) {
            return this._weekdaysStrictRegex;
        } else {
            return this._weekdaysRegex;
        }
    } else {
        if (!hasOwnProp(this, '_weekdaysRegex')) {
            this._weekdaysRegex = defaultWeekdaysRegex;
        }
        return this._weekdaysStrictRegex && isStrict
            ? this._weekdaysStrictRegex
            : this._weekdaysRegex;
    }
}

function weekdaysShortRegex(isStrict) {
    if (this._weekdaysParseExact) {
        if (!hasOwnProp(this, '_weekdaysRegex')) {
            computeWeekdaysParse.call(this);
        }
        if (isStrict) {
            return this._weekdaysShortStrictRegex;
        } else {
            return this._weekdaysShortRegex;
        }
    } else {
        if (!hasOwnProp(this, '_weekdaysShortRegex')) {
            this._weekdaysShortRegex = defaultWeekdaysShortRegex;
        }
        return this._weekdaysShortStrictRegex && isStrict
            ? this._weekdaysShortStrictRegex
            : this._weekdaysShortRegex;
    }
}

function weekdaysMinRegex(isStrict) {
    if (this._weekdaysParseExact) {
        if (!hasOwnProp(this, '_weekdaysRegex')) {
            computeWeekdaysParse.call(this);
        }
        if (isStrict) {
            return this._weekdaysMinStrictRegex;
        } else {
            return this._weekdaysMinRegex;
        }
    } else {
        if (!hasOwnProp(this, '_weekdaysMinRegex')) {
            this._weekdaysMinRegex = defaultWeekdaysMinRegex;
        }
        return this._weekdaysMinStrictRegex && isStrict
            ? this._weekdaysMinStrictRegex
            : this._weekdaysMinRegex;
    }
}

function computeWeekdaysParse() {
    function cmpLenRev(a, b) {
        return b.length - a.length;
    }

    var minPieces = [],
        shortPieces = [],
        longPieces = [],
        mixedPieces = [],
        i,
        mom,
        minp,
        shortp,
        longp;
    for (i = 0; i < 7; i++) {
        // make the regex if we don't have it already
        mom = createUTC([2000, 1]).day(i);
        minp = regexEscape(this.weekdaysMin(mom, ''));
        shortp = regexEscape(this.weekdaysShort(mom, ''));
        longp = regexEscape(this.weekdays(mom, ''));
        minPieces.push(minp);
        shortPieces.push(shortp);
        longPieces.push(longp);
        mixedPieces.push(minp);
        mixedPieces.push(shortp);
        mixedPieces.push(longp);
    }
    // Sorting makes sure if one weekday (or abbr) is a prefix of another it
    // will match the longer piece.
    minPieces.sort(cmpLenRev);
    shortPieces.sort(cmpLenRev);
    longPieces.sort(cmpLenRev);
    mixedPieces.sort(cmpLenRev);

    this._weekdaysRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
    this._weekdaysShortRegex = this._weekdaysRegex;
    this._weekdaysMinRegex = this._weekdaysRegex;

    this._weekdaysStrictRegex = new RegExp(
        '^(' + longPieces.join('|') + ')',
        'i'
    );
    this._weekdaysShortStrictRegex = new RegExp(
        '^(' + shortPieces.join('|') + ')',
        'i'
    );
    this._weekdaysMinStrictRegex = new RegExp(
        '^(' + minPieces.join('|') + ')',
        'i'
    );
}

// FORMATTING

function hFormat() {
    return this.hours() % 12 || 12;
}

function kFormat() {
    return this.hours() || 24;
}

addFormatToken('H', ['HH', 2], 0, 'hour');
addFormatToken('h', ['hh', 2], 0, hFormat);
addFormatToken('k', ['kk', 2], 0, kFormat);

addFormatToken('hmm', 0, 0, function () {
    return '' + hFormat.apply(this) + zeroFill(this.minutes(), 2);
});

addFormatToken('hmmss', 0, 0, function () {
    return (
        '' +
        hFormat.apply(this) +
        zeroFill(this.minutes(), 2) +
        zeroFill(this.seconds(), 2)
    );
});

addFormatToken('Hmm', 0, 0, function () {
    return '' + this.hours() + zeroFill(this.minutes(), 2);
});

addFormatToken('Hmmss', 0, 0, function () {
    return (
        '' +
        this.hours() +
        zeroFill(this.minutes(), 2) +
        zeroFill(this.seconds(), 2)
    );
});

function meridiem(token, lowercase) {
    addFormatToken(token, 0, 0, function () {
        return this.localeData().meridiem(
            this.hours(),
            this.minutes(),
            lowercase
        );
    });
}

meridiem('a', true);
meridiem('A', false);

// ALIASES

addUnitAlias('hour', 'h');

// PRIORITY
addUnitPriority('hour', 13);

// PARSING

function matchMeridiem(isStrict, locale) {
    return locale._meridiemParse;
}

addRegexToken('a', matchMeridiem);
addRegexToken('A', matchMeridiem);
addRegexToken('H', match1to2);
addRegexToken('h', match1to2);
addRegexToken('k', match1to2);
addRegexToken('HH', match1to2, match2);
addRegexToken('hh', match1to2, match2);
addRegexToken('kk', match1to2, match2);

addRegexToken('hmm', match3to4);
addRegexToken('hmmss', match5to6);
addRegexToken('Hmm', match3to4);
addRegexToken('Hmmss', match5to6);

addParseToken(['H', 'HH'], HOUR);
addParseToken(['k', 'kk'], function (input, array, config) {
    var kInput = toInt(input);
    array[HOUR] = kInput === 24 ? 0 : kInput;
});
addParseToken(['a', 'A'], function (input, array, config) {
    config._isPm = config._locale.isPM(input);
    config._meridiem = input;
});
addParseToken(['h', 'hh'], function (input, array, config) {
    array[HOUR] = toInt(input);
    getParsingFlags(config).bigHour = true;
});
addParseToken('hmm', function (input, array, config) {
    var pos = input.length - 2;
    array[HOUR] = toInt(input.substr(0, pos));
    array[MINUTE] = toInt(input.substr(pos));
    getParsingFlags(config).bigHour = true;
});
addParseToken('hmmss', function (input, array, config) {
    var pos1 = input.length - 4,
        pos2 = input.length - 2;
    array[HOUR] = toInt(input.substr(0, pos1));
    array[MINUTE] = toInt(input.substr(pos1, 2));
    array[SECOND] = toInt(input.substr(pos2));
    getParsingFlags(config).bigHour = true;
});
addParseToken('Hmm', function (input, array, config) {
    var pos = input.length - 2;
    array[HOUR] = toInt(input.substr(0, pos));
    array[MINUTE] = toInt(input.substr(pos));
});
addParseToken('Hmmss', function (input, array, config) {
    var pos1 = input.length - 4,
        pos2 = input.length - 2;
    array[HOUR] = toInt(input.substr(0, pos1));
    array[MINUTE] = toInt(input.substr(pos1, 2));
    array[SECOND] = toInt(input.substr(pos2));
});

// LOCALES

function localeIsPM(input) {
    // IE8 Quirks Mode & IE7 Standards Mode do not allow accessing strings like arrays
    // Using charAt should be more compatible.
    return (input + '').toLowerCase().charAt(0) === 'p';
}

var defaultLocaleMeridiemParse = /[ap]\.?m?\.?/i,
    // Setting the hour should keep the time, because the user explicitly
    // specified which hour they want. So trying to maintain the same hour (in
    // a new timezone) makes sense. Adding/subtracting hours does not follow
    // this rule.
    getSetHour = makeGetSet('Hours', true);

function localeMeridiem(hours, minutes, isLower) {
    if (hours > 11) {
        return isLower ? 'pm' : 'PM';
    } else {
        return isLower ? 'am' : 'AM';
    }
}

var baseConfig = {
    calendar: defaultCalendar,
    longDateFormat: defaultLongDateFormat,
    invalidDate: defaultInvalidDate,
    ordinal: defaultOrdinal,
    dayOfMonthOrdinalParse: defaultDayOfMonthOrdinalParse,
    relativeTime: defaultRelativeTime,

    months: defaultLocaleMonths,
    monthsShort: defaultLocaleMonthsShort,

    week: defaultLocaleWeek,

    weekdays: defaultLocaleWeekdays,
    weekdaysMin: defaultLocaleWeekdaysMin,
    weekdaysShort: defaultLocaleWeekdaysShort,

    meridiemParse: defaultLocaleMeridiemParse,
};

// internal storage for locale config files
var locales = {},
    localeFamilies = {},
    globalLocale;

function commonPrefix(arr1, arr2) {
    var i,
        minl = Math.min(arr1.length, arr2.length);
    for (i = 0; i < minl; i += 1) {
        if (arr1[i] !== arr2[i]) {
            return i;
        }
    }
    return minl;
}

function normalizeLocale(key) {
    return key ? key.toLowerCase().replace('_', '-') : key;
}

// pick the locale from the array
// try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
// substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
function chooseLocale(names) {
    var i = 0,
        j,
        next,
        locale,
        split;

    while (i < names.length) {
        split = normalizeLocale(names[i]).split('-');
        j = split.length;
        next = normalizeLocale(names[i + 1]);
        next = next ? next.split('-') : null;
        while (j > 0) {
            locale = loadLocale(split.slice(0, j).join('-'));
            if (locale) {
                return locale;
            }
            if (
                next &&
                next.length >= j &&
                commonPrefix(split, next) >= j - 1
            ) {
                //the next array item is better than a shallower substring of this one
                break;
            }
            j--;
        }
        i++;
    }
    return globalLocale;
}

function loadLocale(name) {
    var oldLocale = null,
        aliasedRequire;
    // TODO: Find a better way to register and load all the locales in Node
    if (
        locales[name] === undefined &&
        typeof module !== 'undefined' &&
        module &&
        module.exports
    ) {
        try {
            oldLocale = globalLocale._abbr;
            aliasedRequire = require;
            aliasedRequire('./locale/' + name);
            getSetGlobalLocale(oldLocale);
        } catch (e) {
            // mark as not found to avoid repeating expensive file require call causing high CPU
            // when trying to find en-US, en_US, en-us for every format call
            locales[name] = null; // null means not found
        }
    }
    return locales[name];
}

// This function will load locale and then set the global locale.  If
// no arguments are passed in, it will simply return the current global
// locale key.
function getSetGlobalLocale(key, values) {
    var data;
    if (key) {
        if (isUndefined(values)) {
            data = getLocale(key);
        } else {
            data = defineLocale(key, values);
        }

        if (data) {
            // moment.duration._locale = moment._locale = data;
            globalLocale = data;
        } else {
            if (typeof console !== 'undefined' && console.warn) {
                //warn user if arguments are passed but the locale could not be set
                console.warn(
                    'Locale ' + key + ' not found. Did you forget to load it?'
                );
            }
        }
    }

    return globalLocale._abbr;
}

function defineLocale(name, config) {
    if (config !== null) {
        var locale,
            parentConfig = baseConfig;
        config.abbr = name;
        if (locales[name] != null) {
            deprecateSimple(
                'defineLocaleOverride',
                'use moment.updateLocale(localeName, config) to change ' +
                    'an existing locale. moment.defineLocale(localeName, ' +
                    'config) should only be used for creating a new locale ' +
                    'See http://momentjs.com/guides/#/warnings/define-locale/ for more info.'
            );
            parentConfig = locales[name]._config;
        } else if (config.parentLocale != null) {
            if (locales[config.parentLocale] != null) {
                parentConfig = locales[config.parentLocale]._config;
            } else {
                locale = loadLocale(config.parentLocale);
                if (locale != null) {
                    parentConfig = locale._config;
                } else {
                    if (!localeFamilies[config.parentLocale]) {
                        localeFamilies[config.parentLocale] = [];
                    }
                    localeFamilies[config.parentLocale].push({
                        name: name,
                        config: config,
                    });
                    return null;
                }
            }
        }
        locales[name] = new Locale(mergeConfigs(parentConfig, config));

        if (localeFamilies[name]) {
            localeFamilies[name].forEach(function (x) {
                defineLocale(x.name, x.config);
            });
        }

        // backwards compat for now: also set the locale
        // make sure we set the locale AFTER all child locales have been
        // created, so we won't end up with the child locale set.
        getSetGlobalLocale(name);

        return locales[name];
    } else {
        // useful for testing
        delete locales[name];
        return null;
    }
}

function updateLocale(name, config) {
    if (config != null) {
        var locale,
            tmpLocale,
            parentConfig = baseConfig;

        if (locales[name] != null && locales[name].parentLocale != null) {
            // Update existing child locale in-place to avoid memory-leaks
            locales[name].set(mergeConfigs(locales[name]._config, config));
        } else {
            // MERGE
            tmpLocale = loadLocale(name);
            if (tmpLocale != null) {
                parentConfig = tmpLocale._config;
            }
            config = mergeConfigs(parentConfig, config);
            if (tmpLocale == null) {
                // updateLocale is called for creating a new locale
                // Set abbr so it will have a name (getters return
                // undefined otherwise).
                config.abbr = name;
            }
            locale = new Locale(config);
            locale.parentLocale = locales[name];
            locales[name] = locale;
        }

        // backwards compat for now: also set the locale
        getSetGlobalLocale(name);
    } else {
        // pass null for config to unupdate, useful for tests
        if (locales[name] != null) {
            if (locales[name].parentLocale != null) {
                locales[name] = locales[name].parentLocale;
                if (name === getSetGlobalLocale()) {
                    getSetGlobalLocale(name);
                }
            } else if (locales[name] != null) {
                delete locales[name];
            }
        }
    }
    return locales[name];
}

// returns locale data
function getLocale(key) {
    var locale;

    if (key && key._locale && key._locale._abbr) {
        key = key._locale._abbr;
    }

    if (!key) {
        return globalLocale;
    }

    if (!isArray(key)) {
        //short-circuit everything else
        locale = loadLocale(key);
        if (locale) {
            return locale;
        }
        key = [key];
    }

    return chooseLocale(key);
}

function listLocales() {
    return keys(locales);
}

function checkOverflow(m) {
    var overflow,
        a = m._a;

    if (a && getParsingFlags(m).overflow === -2) {
        overflow =
            a[MONTH] < 0 || a[MONTH] > 11
                ? MONTH
                : a[DATE] < 1 || a[DATE] > daysInMonth(a[YEAR], a[MONTH])
                ? DATE
                : a[HOUR] < 0 ||
                  a[HOUR] > 24 ||
                  (a[HOUR] === 24 &&
                      (a[MINUTE] !== 0 ||
                          a[SECOND] !== 0 ||
                          a[MILLISECOND] !== 0))
                ? HOUR
                : a[MINUTE] < 0 || a[MINUTE] > 59
                ? MINUTE
                : a[SECOND] < 0 || a[SECOND] > 59
                ? SECOND
                : a[MILLISECOND] < 0 || a[MILLISECOND] > 999
                ? MILLISECOND
                : -1;

        if (
            getParsingFlags(m)._overflowDayOfYear &&
            (overflow < YEAR || overflow > DATE)
        ) {
            overflow = DATE;
        }
        if (getParsingFlags(m)._overflowWeeks && overflow === -1) {
            overflow = WEEK;
        }
        if (getParsingFlags(m)._overflowWeekday && overflow === -1) {
            overflow = WEEKDAY;
        }

        getParsingFlags(m).overflow = overflow;
    }

    return m;
}

// iso 8601 regex
// 0000-00-00 0000-W00 or 0000-W00-0 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000 or +00)
var extendedIsoRegex = /^\s*((?:[+-]\d{6}|\d{4})-(?:\d\d-\d\d|W\d\d-\d|W\d\d|\d\d\d|\d\d))(?:(T| )(\d\d(?::\d\d(?::\d\d(?:[.,]\d+)?)?)?)([+-]\d\d(?::?\d\d)?|\s*Z)?)?$/,
    basicIsoRegex = /^\s*((?:[+-]\d{6}|\d{4})(?:\d\d\d\d|W\d\d\d|W\d\d|\d\d\d|\d\d|))(?:(T| )(\d\d(?:\d\d(?:\d\d(?:[.,]\d+)?)?)?)([+-]\d\d(?::?\d\d)?|\s*Z)?)?$/,
    tzRegex = /Z|[+-]\d\d(?::?\d\d)?/,
    isoDates = [
        ['YYYYYY-MM-DD', /[+-]\d{6}-\d\d-\d\d/],
        ['YYYY-MM-DD', /\d{4}-\d\d-\d\d/],
        ['GGGG-[W]WW-E', /\d{4}-W\d\d-\d/],
        ['GGGG-[W]WW', /\d{4}-W\d\d/, false],
        ['YYYY-DDD', /\d{4}-\d{3}/],
        ['YYYY-MM', /\d{4}-\d\d/, false],
        ['YYYYYYMMDD', /[+-]\d{10}/],
        ['YYYYMMDD', /\d{8}/],
        ['GGGG[W]WWE', /\d{4}W\d{3}/],
        ['GGGG[W]WW', /\d{4}W\d{2}/, false],
        ['YYYYDDD', /\d{7}/],
        ['YYYYMM', /\d{6}/, false],
        ['YYYY', /\d{4}/, false],
    ],
    // iso time formats and regexes
    isoTimes = [
        ['HH:mm:ss.SSSS', /\d\d:\d\d:\d\d\.\d+/],
        ['HH:mm:ss,SSSS', /\d\d:\d\d:\d\d,\d+/],
        ['HH:mm:ss', /\d\d:\d\d:\d\d/],
        ['HH:mm', /\d\d:\d\d/],
        ['HHmmss.SSSS', /\d\d\d\d\d\d\.\d+/],
        ['HHmmss,SSSS', /\d\d\d\d\d\d,\d+/],
        ['HHmmss', /\d\d\d\d\d\d/],
        ['HHmm', /\d\d\d\d/],
        ['HH', /\d\d/],
    ],
    aspNetJsonRegex = /^\/?Date\((-?\d+)/i,
    // RFC 2822 regex: For details see https://tools.ietf.org/html/rfc2822#section-3.3
    rfc2822 = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),?\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|([+-]\d{4}))$/,
    obsOffsets = {
        UT: 0,
        GMT: 0,
        EDT: -4 * 60,
        EST: -5 * 60,
        CDT: -5 * 60,
        CST: -6 * 60,
        MDT: -6 * 60,
        MST: -7 * 60,
        PDT: -7 * 60,
        PST: -8 * 60,
    };

// date from iso format
function configFromISO(config) {
    var i,
        l,
        string = config._i,
        match = extendedIsoRegex.exec(string) || basicIsoRegex.exec(string),
        allowTime,
        dateFormat,
        timeFormat,
        tzFormat;

    if (match) {
        getParsingFlags(config).iso = true;

        for (i = 0, l = isoDates.length; i < l; i++) {
            if (isoDates[i][1].exec(match[1])) {
                dateFormat = isoDates[i][0];
                allowTime = isoDates[i][2] !== false;
                break;
            }
        }
        if (dateFormat == null) {
            config._isValid = false;
            return;
        }
        if (match[3]) {
            for (i = 0, l = isoTimes.length; i < l; i++) {
                if (isoTimes[i][1].exec(match[3])) {
                    // match[2] should be 'T' or space
                    timeFormat = (match[2] || ' ') + isoTimes[i][0];
                    break;
                }
            }
            if (timeFormat == null) {
                config._isValid = false;
                return;
            }
        }
        if (!allowTime && timeFormat != null) {
            config._isValid = false;
            return;
        }
        if (match[4]) {
            if (tzRegex.exec(match[4])) {
                tzFormat = 'Z';
            } else {
                config._isValid = false;
                return;
            }
        }
        config._f = dateFormat + (timeFormat || '') + (tzFormat || '');
        configFromStringAndFormat(config);
    } else {
        config._isValid = false;
    }
}

function extractFromRFC2822Strings(
    yearStr,
    monthStr,
    dayStr,
    hourStr,
    minuteStr,
    secondStr
) {
    var result = [
        untruncateYear(yearStr),
        defaultLocaleMonthsShort.indexOf(monthStr),
        parseInt(dayStr, 10),
        parseInt(hourStr, 10),
        parseInt(minuteStr, 10),
    ];

    if (secondStr) {
        result.push(parseInt(secondStr, 10));
    }

    return result;
}

function untruncateYear(yearStr) {
    var year = parseInt(yearStr, 10);
    if (year <= 49) {
        return 2000 + year;
    } else if (year <= 999) {
        return 1900 + year;
    }
    return year;
}

function preprocessRFC2822(s) {
    // Remove comments and folding whitespace and replace multiple-spaces with a single space
    return s
        .replace(/\([^)]*\)|[\n\t]/g, ' ')
        .replace(/(\s\s+)/g, ' ')
        .replace(/^\s\s*/, '')
        .replace(/\s\s*$/, '');
}

function checkWeekday(weekdayStr, parsedInput, config) {
    if (weekdayStr) {
        // TODO: Replace the vanilla JS Date object with an independent day-of-week check.
        var weekdayProvided = defaultLocaleWeekdaysShort.indexOf(weekdayStr),
            weekdayActual = new Date(
                parsedInput[0],
                parsedInput[1],
                parsedInput[2]
            ).getDay();
        if (weekdayProvided !== weekdayActual) {
            getParsingFlags(config).weekdayMismatch = true;
            config._isValid = false;
            return false;
        }
    }
    return true;
}

function calculateOffset(obsOffset, militaryOffset, numOffset) {
    if (obsOffset) {
        return obsOffsets[obsOffset];
    } else if (militaryOffset) {
        // the only allowed military tz is Z
        return 0;
    } else {
        var hm = parseInt(numOffset, 10),
            m = hm % 100,
            h = (hm - m) / 100;
        return h * 60 + m;
    }
}

// date and time from ref 2822 format
function configFromRFC2822(config) {
    var match = rfc2822.exec(preprocessRFC2822(config._i)),
        parsedArray;
    if (match) {
        parsedArray = extractFromRFC2822Strings(
            match[4],
            match[3],
            match[2],
            match[5],
            match[6],
            match[7]
        );
        if (!checkWeekday(match[1], parsedArray, config)) {
            return;
        }

        config._a = parsedArray;
        config._tzm = calculateOffset(match[8], match[9], match[10]);

        config._d = createUTCDate.apply(null, config._a);
        config._d.setUTCMinutes(config._d.getUTCMinutes() - config._tzm);

        getParsingFlags(config).rfc2822 = true;
    } else {
        config._isValid = false;
    }
}

// date from 1) ASP.NET, 2) ISO, 3) RFC 2822 formats, or 4) optional fallback if parsing isn't strict
function configFromString(config) {
    var matched = aspNetJsonRegex.exec(config._i);
    if (matched !== null) {
        config._d = new Date(+matched[1]);
        return;
    }

    configFromISO(config);
    if (config._isValid === false) {
        delete config._isValid;
    } else {
        return;
    }

    configFromRFC2822(config);
    if (config._isValid === false) {
        delete config._isValid;
    } else {
        return;
    }

    if (config._strict) {
        config._isValid = false;
    } else {
        // Final attempt, use Input Fallback
        hooks.createFromInputFallback(config);
    }
}

hooks.createFromInputFallback = deprecate(
    'value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), ' +
        'which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are ' +
        'discouraged. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.',
    function (config) {
        config._d = new Date(config._i + (config._useUTC ? ' UTC' : ''));
    }
);

// Pick the first defined of two or three arguments.
function defaults(a, b, c) {
    if (a != null) {
        return a;
    }
    if (b != null) {
        return b;
    }
    return c;
}

function currentDateArray(config) {
    // hooks is actually the exported moment object
    var nowValue = new Date(hooks.now());
    if (config._useUTC) {
        return [
            nowValue.getUTCFullYear(),
            nowValue.getUTCMonth(),
            nowValue.getUTCDate(),
        ];
    }
    return [nowValue.getFullYear(), nowValue.getMonth(), nowValue.getDate()];
}

// convert an array to a date.
// the array should mirror the parameters below
// note: all values past the year are optional and will default to the lowest possible value.
// [year, month, day , hour, minute, second, millisecond]
function configFromArray(config) {
    var i,
        date,
        input = [],
        currentDate,
        expectedWeekday,
        yearToUse;

    if (config._d) {
        return;
    }

    currentDate = currentDateArray(config);

    //compute day of the year from weeks and weekdays
    if (config._w && config._a[DATE] == null && config._a[MONTH] == null) {
        dayOfYearFromWeekInfo(config);
    }

    //if the day of the year is set, figure out what it is
    if (config._dayOfYear != null) {
        yearToUse = defaults(config._a[YEAR], currentDate[YEAR]);

        if (
            config._dayOfYear > daysInYear(yearToUse) ||
            config._dayOfYear === 0
        ) {
            getParsingFlags(config)._overflowDayOfYear = true;
        }

        date = createUTCDate(yearToUse, 0, config._dayOfYear);
        config._a[MONTH] = date.getUTCMonth();
        config._a[DATE] = date.getUTCDate();
    }

    // Default to current date.
    // * if no year, month, day of month are given, default to today
    // * if day of month is given, default month and year
    // * if month is given, default only year
    // * if year is given, don't default anything
    for (i = 0; i < 3 && config._a[i] == null; ++i) {
        config._a[i] = input[i] = currentDate[i];
    }

    // Zero out whatever was not defaulted, including time
    for (; i < 7; i++) {
        config._a[i] = input[i] =
            config._a[i] == null ? (i === 2 ? 1 : 0) : config._a[i];
    }

    // Check for 24:00:00.000
    if (
        config._a[HOUR] === 24 &&
        config._a[MINUTE] === 0 &&
        config._a[SECOND] === 0 &&
        config._a[MILLISECOND] === 0
    ) {
        config._nextDay = true;
        config._a[HOUR] = 0;
    }

    config._d = (config._useUTC ? createUTCDate : createDate).apply(
        null,
        input
    );
    expectedWeekday = config._useUTC
        ? config._d.getUTCDay()
        : config._d.getDay();

    // Apply timezone offset from input. The actual utcOffset can be changed
    // with parseZone.
    if (config._tzm != null) {
        config._d.setUTCMinutes(config._d.getUTCMinutes() - config._tzm);
    }

    if (config._nextDay) {
        config._a[HOUR] = 24;
    }

    // check for mismatching day of week
    if (
        config._w &&
        typeof config._w.d !== 'undefined' &&
        config._w.d !== expectedWeekday
    ) {
        getParsingFlags(config).weekdayMismatch = true;
    }
}

function dayOfYearFromWeekInfo(config) {
    var w, weekYear, week, weekday, dow, doy, temp, weekdayOverflow, curWeek;

    w = config._w;
    if (w.GG != null || w.W != null || w.E != null) {
        dow = 1;
        doy = 4;

        // TODO: We need to take the current isoWeekYear, but that depends on
        // how we interpret now (local, utc, fixed offset). So create
        // a now version of current config (take local/utc/offset flags, and
        // create now).
        weekYear = defaults(
            w.GG,
            config._a[YEAR],
            weekOfYear(createLocal(), 1, 4).year
        );
        week = defaults(w.W, 1);
        weekday = defaults(w.E, 1);
        if (weekday < 1 || weekday > 7) {
            weekdayOverflow = true;
        }
    } else {
        dow = config._locale._week.dow;
        doy = config._locale._week.doy;

        curWeek = weekOfYear(createLocal(), dow, doy);

        weekYear = defaults(w.gg, config._a[YEAR], curWeek.year);

        // Default to current week.
        week = defaults(w.w, curWeek.week);

        if (w.d != null) {
            // weekday -- low day numbers are considered next week
            weekday = w.d;
            if (weekday < 0 || weekday > 6) {
                weekdayOverflow = true;
            }
        } else if (w.e != null) {
            // local weekday -- counting starts from beginning of week
            weekday = w.e + dow;
            if (w.e < 0 || w.e > 6) {
                weekdayOverflow = true;
            }
        } else {
            // default to beginning of week
            weekday = dow;
        }
    }
    if (week < 1 || week > weeksInYear(weekYear, dow, doy)) {
        getParsingFlags(config)._overflowWeeks = true;
    } else if (weekdayOverflow != null) {
        getParsingFlags(config)._overflowWeekday = true;
    } else {
        temp = dayOfYearFromWeeks(weekYear, week, weekday, dow, doy);
        config._a[YEAR] = temp.year;
        config._dayOfYear = temp.dayOfYear;
    }
}

// constant that refers to the ISO standard
hooks.ISO_8601 = function () {};

// constant that refers to the RFC 2822 form
hooks.RFC_2822 = function () {};

// date from string and format string
function configFromStringAndFormat(config) {
    // TODO: Move this to another part of the creation flow to prevent circular deps
    if (config._f === hooks.ISO_8601) {
        configFromISO(config);
        return;
    }
    if (config._f === hooks.RFC_2822) {
        configFromRFC2822(config);
        return;
    }
    config._a = [];
    getParsingFlags(config).empty = true;

    // This array is used to make a Date, either with `new Date` or `Date.UTC`
    var string = '' + config._i,
        i,
        parsedInput,
        tokens,
        token,
        skipped,
        stringLength = string.length,
        totalParsedInputLength = 0,
        era;

    tokens =
        expandFormat(config._f, config._locale).match(formattingTokens) || [];

    for (i = 0; i < tokens.length; i++) {
        token = tokens[i];
        parsedInput = (string.match(getParseRegexForToken(token, config)) ||
            [])[0];
        if (parsedInput) {
            skipped = string.substr(0, string.indexOf(parsedInput));
            if (skipped.length > 0) {
                getParsingFlags(config).unusedInput.push(skipped);
            }
            string = string.slice(
                string.indexOf(parsedInput) + parsedInput.length
            );
            totalParsedInputLength += parsedInput.length;
        }
        // don't parse if it's not a known token
        if (formatTokenFunctions[token]) {
            if (parsedInput) {
                getParsingFlags(config).empty = false;
            } else {
                getParsingFlags(config).unusedTokens.push(token);
            }
            addTimeToArrayFromToken(token, parsedInput, config);
        } else if (config._strict && !parsedInput) {
            getParsingFlags(config).unusedTokens.push(token);
        }
    }

    // add remaining unparsed input length to the string
    getParsingFlags(config).charsLeftOver =
        stringLength - totalParsedInputLength;
    if (string.length > 0) {
        getParsingFlags(config).unusedInput.push(string);
    }

    // clear _12h flag if hour is <= 12
    if (
        config._a[HOUR] <= 12 &&
        getParsingFlags(config).bigHour === true &&
        config._a[HOUR] > 0
    ) {
        getParsingFlags(config).bigHour = undefined;
    }

    getParsingFlags(config).parsedDateParts = config._a.slice(0);
    getParsingFlags(config).meridiem = config._meridiem;
    // handle meridiem
    config._a[HOUR] = meridiemFixWrap(
        config._locale,
        config._a[HOUR],
        config._meridiem
    );

    // handle era
    era = getParsingFlags(config).era;
    if (era !== null) {
        config._a[YEAR] = config._locale.erasConvertYear(era, config._a[YEAR]);
    }

    configFromArray(config);
    checkOverflow(config);
}

function meridiemFixWrap(locale, hour, meridiem) {
    var isPm;

    if (meridiem == null) {
        // nothing to do
        return hour;
    }
    if (locale.meridiemHour != null) {
        return locale.meridiemHour(hour, meridiem);
    } else if (locale.isPM != null) {
        // Fallback
        isPm = locale.isPM(meridiem);
        if (isPm && hour < 12) {
            hour += 12;
        }
        if (!isPm && hour === 12) {
            hour = 0;
        }
        return hour;
    } else {
        // this is not supposed to happen
        return hour;
    }
}

// date from string and array of format strings
function configFromStringAndArray(config) {
    var tempConfig,
        bestMoment,
        scoreToBeat,
        i,
        currentScore,
        validFormatFound,
        bestFormatIsValid = false;

    if (config._f.length === 0) {
        getParsingFlags(config).invalidFormat = true;
        config._d = new Date(NaN);
        return;
    }

    for (i = 0; i < config._f.length; i++) {
        currentScore = 0;
        validFormatFound = false;
        tempConfig = copyConfig({}, config);
        if (config._useUTC != null) {
            tempConfig._useUTC = config._useUTC;
        }
        tempConfig._f = config._f[i];
        configFromStringAndFormat(tempConfig);

        if (isValid(tempConfig)) {
            validFormatFound = true;
        }

        // if there is any input that was not parsed add a penalty for that format
        currentScore += getParsingFlags(tempConfig).charsLeftOver;

        //or tokens
        currentScore += getParsingFlags(tempConfig).unusedTokens.length * 10;

        getParsingFlags(tempConfig).score = currentScore;

        if (!bestFormatIsValid) {
            if (
                scoreToBeat == null ||
                currentScore < scoreToBeat ||
                validFormatFound
            ) {
                scoreToBeat = currentScore;
                bestMoment = tempConfig;
                if (validFormatFound) {
                    bestFormatIsValid = true;
                }
            }
        } else {
            if (currentScore < scoreToBeat) {
                scoreToBeat = currentScore;
                bestMoment = tempConfig;
            }
        }
    }

    extend(config, bestMoment || tempConfig);
}

function configFromObject(config) {
    if (config._d) {
        return;
    }

    var i = normalizeObjectUnits(config._i),
        dayOrDate = i.day === undefined ? i.date : i.day;
    config._a = map(
        [i.year, i.month, dayOrDate, i.hour, i.minute, i.second, i.millisecond],
        function (obj) {
            return obj && parseInt(obj, 10);
        }
    );

    configFromArray(config);
}

function createFromConfig(config) {
    var res = new Moment(checkOverflow(prepareConfig(config)));
    if (res._nextDay) {
        // Adding is smart enough around DST
        res.add(1, 'd');
        res._nextDay = undefined;
    }

    return res;
}

function prepareConfig(config) {
    var input = config._i,
        format = config._f;

    config._locale = config._locale || getLocale(config._l);

    if (input === null || (format === undefined && input === '')) {
        return createInvalid({ nullInput: true });
    }

    if (typeof input === 'string') {
        config._i = input = config._locale.preparse(input);
    }

    if (isMoment(input)) {
        return new Moment(checkOverflow(input));
    } else if (isDate(input)) {
        config._d = input;
    } else if (isArray(format)) {
        configFromStringAndArray(config);
    } else if (format) {
        configFromStringAndFormat(config);
    } else {
        configFromInput(config);
    }

    if (!isValid(config)) {
        config._d = null;
    }

    return config;
}

function configFromInput(config) {
    var input = config._i;
    if (isUndefined(input)) {
        config._d = new Date(hooks.now());
    } else if (isDate(input)) {
        config._d = new Date(input.valueOf());
    } else if (typeof input === 'string') {
        configFromString(config);
    } else if (isArray(input)) {
        config._a = map(input.slice(0), function (obj) {
            return parseInt(obj, 10);
        });
        configFromArray(config);
    } else if (isObject(input)) {
        configFromObject(config);
    } else if (isNumber(input)) {
        // from milliseconds
        config._d = new Date(input);
    } else {
        hooks.createFromInputFallback(config);
    }
}

function createLocalOrUTC(input, format, locale, strict, isUTC) {
    var c = {};

    if (format === true || format === false) {
        strict = format;
        format = undefined;
    }

    if (locale === true || locale === false) {
        strict = locale;
        locale = undefined;
    }

    if (
        (isObject(input) && isObjectEmpty(input)) ||
        (isArray(input) && input.length === 0)
    ) {
        input = undefined;
    }
    // object construction must be done this way.
    // https://github.com/moment/moment/issues/1423
    c._isAMomentObject = true;
    c._useUTC = c._isUTC = isUTC;
    c._l = locale;
    c._i = input;
    c._f = format;
    c._strict = strict;

    return createFromConfig(c);
}

function createLocal(input, format, locale, strict) {
    return createLocalOrUTC(input, format, locale, strict, false);
}

var prototypeMin = deprecate(
        'moment().min is deprecated, use moment.max instead. http://momentjs.com/guides/#/warnings/min-max/',
        function () {
            var other = createLocal.apply(null, arguments);
            if (this.isValid() && other.isValid()) {
                return other < this ? this : other;
            } else {
                return createInvalid();
            }
        }
    ),
    prototypeMax = deprecate(
        'moment().max is deprecated, use moment.min instead. http://momentjs.com/guides/#/warnings/min-max/',
        function () {
            var other = createLocal.apply(null, arguments);
            if (this.isValid() && other.isValid()) {
                return other > this ? this : other;
            } else {
                return createInvalid();
            }
        }
    );

// Pick a moment m from moments so that m[fn](other) is true for all
// other. This relies on the function fn to be transitive.
//
// moments should either be an array of moment objects or an array, whose
// first element is an array of moment objects.
function pickBy(fn, moments) {
    var res, i;
    if (moments.length === 1 && isArray(moments[0])) {
        moments = moments[0];
    }
    if (!moments.length) {
        return createLocal();
    }
    res = moments[0];
    for (i = 1; i < moments.length; ++i) {
        if (!moments[i].isValid() || moments[i][fn](res)) {
            res = moments[i];
        }
    }
    return res;
}

// TODO: Use [].sort instead?
function min() {
    var args = [].slice.call(arguments, 0);

    return pickBy('isBefore', args);
}

function max() {
    var args = [].slice.call(arguments, 0);

    return pickBy('isAfter', args);
}

var now = function () {
    return Date.now ? Date.now() : +new Date();
};

var ordering = [
    'year',
    'quarter',
    'month',
    'week',
    'day',
    'hour',
    'minute',
    'second',
    'millisecond',
];

function isDurationValid(m) {
    var key,
        unitHasDecimal = false,
        i;
    for (key in m) {
        if (
            hasOwnProp(m, key) &&
            !(
                indexOf.call(ordering, key) !== -1 &&
                (m[key] == null || !isNaN(m[key]))
            )
        ) {
            return false;
        }
    }

    for (i = 0; i < ordering.length; ++i) {
        if (m[ordering[i]]) {
            if (unitHasDecimal) {
                return false; // only allow non-integers for smallest unit
            }
            if (parseFloat(m[ordering[i]]) !== toInt(m[ordering[i]])) {
                unitHasDecimal = true;
            }
        }
    }

    return true;
}

function isValid$1() {
    return this._isValid;
}

function createInvalid$1() {
    return createDuration(NaN);
}

function Duration(duration) {
    var normalizedInput = normalizeObjectUnits(duration),
        years = normalizedInput.year || 0,
        quarters = normalizedInput.quarter || 0,
        months = normalizedInput.month || 0,
        weeks = normalizedInput.week || normalizedInput.isoWeek || 0,
        days = normalizedInput.day || 0,
        hours = normalizedInput.hour || 0,
        minutes = normalizedInput.minute || 0,
        seconds = normalizedInput.second || 0,
        milliseconds = normalizedInput.millisecond || 0;

    this._isValid = isDurationValid(normalizedInput);

    // representation for dateAddRemove
    this._milliseconds =
        +milliseconds +
        seconds * 1e3 + // 1000
        minutes * 6e4 + // 1000 * 60
        hours * 1000 * 60 * 60; //using 1000 * 60 * 60 instead of 36e5 to avoid floating point rounding errors https://github.com/moment/moment/issues/2978
    // Because of dateAddRemove treats 24 hours as different from a
    // day when working around DST, we need to store them separately
    this._days = +days + weeks * 7;
    // It is impossible to translate months into days without knowing
    // which months you are are talking about, so we have to store
    // it separately.
    this._months = +months + quarters * 3 + years * 12;

    this._data = {};

    this._locale = getLocale();

    this._bubble();
}

function isDuration(obj) {
    return obj instanceof Duration;
}

function absRound(number) {
    if (number < 0) {
        return Math.round(-1 * number) * -1;
    } else {
        return Math.round(number);
    }
}

// compare two arrays, return the number of differences
function compareArrays(array1, array2, dontConvert) {
    var len = Math.min(array1.length, array2.length),
        lengthDiff = Math.abs(array1.length - array2.length),
        diffs = 0,
        i;
    for (i = 0; i < len; i++) {
        if (
            (dontConvert && array1[i] !== array2[i]) ||
            (!dontConvert && toInt(array1[i]) !== toInt(array2[i]))
        ) {
            diffs++;
        }
    }
    return diffs + lengthDiff;
}

// FORMATTING

function offset(token, separator) {
    addFormatToken(token, 0, 0, function () {
        var offset = this.utcOffset(),
            sign = '+';
        if (offset < 0) {
            offset = -offset;
            sign = '-';
        }
        return (
            sign +
            zeroFill(~~(offset / 60), 2) +
            separator +
            zeroFill(~~offset % 60, 2)
        );
    });
}

offset('Z', ':');
offset('ZZ', '');

// PARSING

addRegexToken('Z', matchShortOffset);
addRegexToken('ZZ', matchShortOffset);
addParseToken(['Z', 'ZZ'], function (input, array, config) {
    config._useUTC = true;
    config._tzm = offsetFromString(matchShortOffset, input);
});

// HELPERS

// timezone chunker
// '+10:00' > ['10',  '00']
// '-1530'  > ['-15', '30']
var chunkOffset = /([\+\-]|\d\d)/gi;

function offsetFromString(matcher, string) {
    var matches = (string || '').match(matcher),
        chunk,
        parts,
        minutes;

    if (matches === null) {
        return null;
    }

    chunk = matches[matches.length - 1] || [];
    parts = (chunk + '').match(chunkOffset) || ['-', 0, 0];
    minutes = +(parts[1] * 60) + toInt(parts[2]);

    return minutes === 0 ? 0 : parts[0] === '+' ? minutes : -minutes;
}

// Return a moment from input, that is local/utc/zone equivalent to model.
function cloneWithOffset(input, model) {
    var res, diff;
    if (model._isUTC) {
        res = model.clone();
        diff =
            (isMoment(input) || isDate(input)
                ? input.valueOf()
                : createLocal(input).valueOf()) - res.valueOf();
        // Use low-level api, because this fn is low-level api.
        res._d.setTime(res._d.valueOf() + diff);
        hooks.updateOffset(res, false);
        return res;
    } else {
        return createLocal(input).local();
    }
}

function getDateOffset(m) {
    // On Firefox.24 Date#getTimezoneOffset returns a floating point.
    // https://github.com/moment/moment/pull/1871
    return -Math.round(m._d.getTimezoneOffset());
}

// HOOKS

// This function will be called whenever a moment is mutated.
// It is intended to keep the offset in sync with the timezone.
hooks.updateOffset = function () {};

// MOMENTS

// keepLocalTime = true means only change the timezone, without
// affecting the local hour. So 5:31:26 +0300 --[utcOffset(2, true)]-->
// 5:31:26 +0200 It is possible that 5:31:26 doesn't exist with offset
// +0200, so we adjust the time as needed, to be valid.
//
// Keeping the time actually adds/subtracts (one hour)
// from the actual represented time. That is why we call updateOffset
// a second time. In case it wants us to change the offset again
// _changeInProgress == true case, then we have to adjust, because
// there is no such time in the given timezone.
function getSetOffset(input, keepLocalTime, keepMinutes) {
    var offset = this._offset || 0,
        localAdjust;
    if (!this.isValid()) {
        return input != null ? this : NaN;
    }
    if (input != null) {
        if (typeof input === 'string') {
            input = offsetFromString(matchShortOffset, input);
            if (input === null) {
                return this;
            }
        } else if (Math.abs(input) < 16 && !keepMinutes) {
            input = input * 60;
        }
        if (!this._isUTC && keepLocalTime) {
            localAdjust = getDateOffset(this);
        }
        this._offset = input;
        this._isUTC = true;
        if (localAdjust != null) {
            this.add(localAdjust, 'm');
        }
        if (offset !== input) {
            if (!keepLocalTime || this._changeInProgress) {
                addSubtract(
                    this,
                    createDuration(input - offset, 'm'),
                    1,
                    false
                );
            } else if (!this._changeInProgress) {
                this._changeInProgress = true;
                hooks.updateOffset(this, true);
                this._changeInProgress = null;
            }
        }
        return this;
    } else {
        return this._isUTC ? offset : getDateOffset(this);
    }
}

function getSetZone(input, keepLocalTime) {
    if (input != null) {
        if (typeof input !== 'string') {
            input = -input;
        }

        this.utcOffset(input, keepLocalTime);

        return this;
    } else {
        return -this.utcOffset();
    }
}

function setOffsetToUTC(keepLocalTime) {
    return this.utcOffset(0, keepLocalTime);
}

function setOffsetToLocal(keepLocalTime) {
    if (this._isUTC) {
        this.utcOffset(0, keepLocalTime);
        this._isUTC = false;

        if (keepLocalTime) {
            this.subtract(getDateOffset(this), 'm');
        }
    }
    return this;
}

function setOffsetToParsedOffset() {
    if (this._tzm != null) {
        this.utcOffset(this._tzm, false, true);
    } else if (typeof this._i === 'string') {
        var tZone = offsetFromString(matchOffset, this._i);
        if (tZone != null) {
            this.utcOffset(tZone);
        } else {
            this.utcOffset(0, true);
        }
    }
    return this;
}

function hasAlignedHourOffset(input) {
    if (!this.isValid()) {
        return false;
    }
    input = input ? createLocal(input).utcOffset() : 0;

    return (this.utcOffset() - input) % 60 === 0;
}

function isDaylightSavingTime() {
    return (
        this.utcOffset() > this.clone().month(0).utcOffset() ||
        this.utcOffset() > this.clone().month(5).utcOffset()
    );
}

function isDaylightSavingTimeShifted() {
    if (!isUndefined(this._isDSTShifted)) {
        return this._isDSTShifted;
    }

    var c = {},
        other;

    copyConfig(c, this);
    c = prepareConfig(c);

    if (c._a) {
        other = c._isUTC ? createUTC(c._a) : createLocal(c._a);
        this._isDSTShifted =
            this.isValid() && compareArrays(c._a, other.toArray()) > 0;
    } else {
        this._isDSTShifted = false;
    }

    return this._isDSTShifted;
}

function isLocal() {
    return this.isValid() ? !this._isUTC : false;
}

function isUtcOffset() {
    return this.isValid() ? this._isUTC : false;
}

function isUtc() {
    return this.isValid() ? this._isUTC && this._offset === 0 : false;
}

// ASP.NET json date format regex
var aspNetRegex = /^(-|\+)?(?:(\d*)[. ])?(\d+):(\d+)(?::(\d+)(\.\d*)?)?$/,
    // from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
    // somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
    // and further modified to allow for strings containing both week and day
    isoRegex = /^(-|\+)?P(?:([-+]?[0-9,.]*)Y)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)W)?(?:([-+]?[0-9,.]*)D)?(?:T(?:([-+]?[0-9,.]*)H)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)S)?)?$/;

function createDuration(input, key) {
    var duration = input,
        // matching against regexp is expensive, do it on demand
        match = null,
        sign,
        ret,
        diffRes;

    if (isDuration(input)) {
        duration = {
            ms: input._milliseconds,
            d: input._days,
            M: input._months,
        };
    } else if (isNumber(input) || !isNaN(+input)) {
        duration = {};
        if (key) {
            duration[key] = +input;
        } else {
            duration.milliseconds = +input;
        }
    } else if ((match = aspNetRegex.exec(input))) {
        sign = match[1] === '-' ? -1 : 1;
        duration = {
            y: 0,
            d: toInt(match[DATE]) * sign,
            h: toInt(match[HOUR]) * sign,
            m: toInt(match[MINUTE]) * sign,
            s: toInt(match[SECOND]) * sign,
            ms: toInt(absRound(match[MILLISECOND] * 1000)) * sign, // the millisecond decimal point is included in the match
        };
    } else if ((match = isoRegex.exec(input))) {
        sign = match[1] === '-' ? -1 : 1;
        duration = {
            y: parseIso(match[2], sign),
            M: parseIso(match[3], sign),
            w: parseIso(match[4], sign),
            d: parseIso(match[5], sign),
            h: parseIso(match[6], sign),
            m: parseIso(match[7], sign),
            s: parseIso(match[8], sign),
        };
    } else if (duration == null) {
        // checks for null or undefined
        duration = {};
    } else if (
        typeof duration === 'object' &&
        ('from' in duration || 'to' in duration)
    ) {
        diffRes = momentsDifference(
            createLocal(duration.from),
            createLocal(duration.to)
        );

        duration = {};
        duration.ms = diffRes.milliseconds;
        duration.M = diffRes.months;
    }

    ret = new Duration(duration);

    if (isDuration(input) && hasOwnProp(input, '_locale')) {
        ret._locale = input._locale;
    }

    if (isDuration(input) && hasOwnProp(input, '_isValid')) {
        ret._isValid = input._isValid;
    }

    return ret;
}

createDuration.fn = Duration.prototype;
createDuration.invalid = createInvalid$1;

function parseIso(inp, sign) {
    // We'd normally use ~~inp for this, but unfortunately it also
    // converts floats to ints.
    // inp may be undefined, so careful calling replace on it.
    var res = inp && parseFloat(inp.replace(',', '.'));
    // apply sign while we're at it
    return (isNaN(res) ? 0 : res) * sign;
}

function positiveMomentsDifference(base, other) {
    var res = {};

    res.months =
        other.month() - base.month() + (other.year() - base.year()) * 12;
    if (base.clone().add(res.months, 'M').isAfter(other)) {
        --res.months;
    }

    res.milliseconds = +other - +base.clone().add(res.months, 'M');

    return res;
}

function momentsDifference(base, other) {
    var res;
    if (!(base.isValid() && other.isValid())) {
        return { milliseconds: 0, months: 0 };
    }

    other = cloneWithOffset(other, base);
    if (base.isBefore(other)) {
        res = positiveMomentsDifference(base, other);
    } else {
        res = positiveMomentsDifference(other, base);
        res.milliseconds = -res.milliseconds;
        res.months = -res.months;
    }

    return res;
}

// TODO: remove 'name' arg after deprecation is removed
function createAdder(direction, name) {
    return function (val, period) {
        var dur, tmp;
        //invert the arguments, but complain about it
        if (period !== null && !isNaN(+period)) {
            deprecateSimple(
                name,
                'moment().' +
                    name +
                    '(period, number) is deprecated. Please use moment().' +
                    name +
                    '(number, period). ' +
                    'See http://momentjs.com/guides/#/warnings/add-inverted-param/ for more info.'
            );
            tmp = val;
            val = period;
            period = tmp;
        }

        dur = createDuration(val, period);
        addSubtract(this, dur, direction);
        return this;
    };
}

function addSubtract(mom, duration, isAdding, updateOffset) {
    var milliseconds = duration._milliseconds,
        days = absRound(duration._days),
        months = absRound(duration._months);

    if (!mom.isValid()) {
        // No op
        return;
    }

    updateOffset = updateOffset == null ? true : updateOffset;

    if (months) {
        setMonth(mom, get(mom, 'Month') + months * isAdding);
    }
    if (days) {
        set$1(mom, 'Date', get(mom, 'Date') + days * isAdding);
    }
    if (milliseconds) {
        mom._d.setTime(mom._d.valueOf() + milliseconds * isAdding);
    }
    if (updateOffset) {
        hooks.updateOffset(mom, days || months);
    }
}

var add = createAdder(1, 'add'),
    subtract = createAdder(-1, 'subtract');

function isString(input) {
    return typeof input === 'string' || input instanceof String;
}

// type MomentInput = Moment | Date | string | number | (number | string)[] | MomentInputObject | void; // null | undefined
function isMomentInput(input) {
    return (
        isMoment(input) ||
        isDate(input) ||
        isString(input) ||
        isNumber(input) ||
        isNumberOrStringArray(input) ||
        isMomentInputObject(input) ||
        input === null ||
        input === undefined
    );
}

function isMomentInputObject(input) {
    var objectTest = isObject(input) && !isObjectEmpty(input),
        propertyTest = false,
        properties = [
            'years',
            'year',
            'y',
            'months',
            'month',
            'M',
            'days',
            'day',
            'd',
            'dates',
            'date',
            'D',
            'hours',
            'hour',
            'h',
            'minutes',
            'minute',
            'm',
            'seconds',
            'second',
            's',
            'milliseconds',
            'millisecond',
            'ms',
        ],
        i,
        property;

    for (i = 0; i < properties.length; i += 1) {
        property = properties[i];
        propertyTest = propertyTest || hasOwnProp(input, property);
    }

    return objectTest && propertyTest;
}

function isNumberOrStringArray(input) {
    var arrayTest = isArray(input),
        dataTypeTest = false;
    if (arrayTest) {
        dataTypeTest =
            input.filter(function (item) {
                return !isNumber(item) && isString(input);
            }).length === 0;
    }
    return arrayTest && dataTypeTest;
}

function isCalendarSpec(input) {
    var objectTest = isObject(input) && !isObjectEmpty(input),
        propertyTest = false,
        properties = [
            'sameDay',
            'nextDay',
            'lastDay',
            'nextWeek',
            'lastWeek',
            'sameElse',
        ],
        i,
        property;

    for (i = 0; i < properties.length; i += 1) {
        property = properties[i];
        propertyTest = propertyTest || hasOwnProp(input, property);
    }

    return objectTest && propertyTest;
}

function getCalendarFormat(myMoment, now) {
    var diff = myMoment.diff(now, 'days', true);
    return diff < -6
        ? 'sameElse'
        : diff < -1
        ? 'lastWeek'
        : diff < 0
        ? 'lastDay'
        : diff < 1
        ? 'sameDay'
        : diff < 2
        ? 'nextDay'
        : diff < 7
        ? 'nextWeek'
        : 'sameElse';
}

function calendar$1(time, formats) {
    // Support for single parameter, formats only overload to the calendar function
    if (arguments.length === 1) {
        if (!arguments[0]) {
            time = undefined;
            formats = undefined;
        } else if (isMomentInput(arguments[0])) {
            time = arguments[0];
            formats = undefined;
        } else if (isCalendarSpec(arguments[0])) {
            formats = arguments[0];
            time = undefined;
        }
    }
    // We want to compare the start of today, vs this.
    // Getting start-of-today depends on whether we're local/utc/offset or not.
    var now = time || createLocal(),
        sod = cloneWithOffset(now, this).startOf('day'),
        format = hooks.calendarFormat(this, sod) || 'sameElse',
        output =
            formats &&
            (isFunction(formats[format])
                ? formats[format].call(this, now)
                : formats[format]);

    return this.format(
        output || this.localeData().calendar(format, this, createLocal(now))
    );
}

function clone() {
    return new Moment(this);
}

function isAfter(input, units) {
    var localInput = isMoment(input) ? input : createLocal(input);
    if (!(this.isValid() && localInput.isValid())) {
        return false;
    }
    units = normalizeUnits(units) || 'millisecond';
    if (units === 'millisecond') {
        return this.valueOf() > localInput.valueOf();
    } else {
        return localInput.valueOf() < this.clone().startOf(units).valueOf();
    }
}

function isBefore(input, units) {
    var localInput = isMoment(input) ? input : createLocal(input);
    if (!(this.isValid() && localInput.isValid())) {
        return false;
    }
    units = normalizeUnits(units) || 'millisecond';
    if (units === 'millisecond') {
        return this.valueOf() < localInput.valueOf();
    } else {
        return this.clone().endOf(units).valueOf() < localInput.valueOf();
    }
}

function isBetween(from, to, units, inclusivity) {
    var localFrom = isMoment(from) ? from : createLocal(from),
        localTo = isMoment(to) ? to : createLocal(to);
    if (!(this.isValid() && localFrom.isValid() && localTo.isValid())) {
        return false;
    }
    inclusivity = inclusivity || '()';
    return (
        (inclusivity[0] === '('
            ? this.isAfter(localFrom, units)
            : !this.isBefore(localFrom, units)) &&
        (inclusivity[1] === ')'
            ? this.isBefore(localTo, units)
            : !this.isAfter(localTo, units))
    );
}

function isSame(input, units) {
    var localInput = isMoment(input) ? input : createLocal(input),
        inputMs;
    if (!(this.isValid() && localInput.isValid())) {
        return false;
    }
    units = normalizeUnits(units) || 'millisecond';
    if (units === 'millisecond') {
        return this.valueOf() === localInput.valueOf();
    } else {
        inputMs = localInput.valueOf();
        return (
            this.clone().startOf(units).valueOf() <= inputMs &&
            inputMs <= this.clone().endOf(units).valueOf()
        );
    }
}

function isSameOrAfter(input, units) {
    return this.isSame(input, units) || this.isAfter(input, units);
}

function isSameOrBefore(input, units) {
    return this.isSame(input, units) || this.isBefore(input, units);
}

function diff(input, units, asFloat) {
    var that, zoneDelta, output;

    if (!this.isValid()) {
        return NaN;
    }

    that = cloneWithOffset(input, this);

    if (!that.isValid()) {
        return NaN;
    }

    zoneDelta = (that.utcOffset() - this.utcOffset()) * 6e4;

    units = normalizeUnits(units);

    switch (units) {
        case 'year':
            output = monthDiff(this, that) / 12;
            break;
        case 'month':
            output = monthDiff(this, that);
            break;
        case 'quarter':
            output = monthDiff(this, that) / 3;
            break;
        case 'second':
            output = (this - that) / 1e3;
            break; // 1000
        case 'minute':
            output = (this - that) / 6e4;
            break; // 1000 * 60
        case 'hour':
            output = (this - that) / 36e5;
            break; // 1000 * 60 * 60
        case 'day':
            output = (this - that - zoneDelta) / 864e5;
            break; // 1000 * 60 * 60 * 24, negate dst
        case 'week':
            output = (this - that - zoneDelta) / 6048e5;
            break; // 1000 * 60 * 60 * 24 * 7, negate dst
        default:
            output = this - that;
    }

    return asFloat ? output : absFloor(output);
}

function monthDiff(a, b) {
    if (a.date() < b.date()) {
        // end-of-month calculations work correct when the start month has more
        // days than the end month.
        return -monthDiff(b, a);
    }
    // difference in months
    var wholeMonthDiff = (b.year() - a.year()) * 12 + (b.month() - a.month()),
        // b is in (anchor - 1 month, anchor + 1 month)
        anchor = a.clone().add(wholeMonthDiff, 'months'),
        anchor2,
        adjust;

    if (b - anchor < 0) {
        anchor2 = a.clone().add(wholeMonthDiff - 1, 'months');
        // linear across the month
        adjust = (b - anchor) / (anchor - anchor2);
    } else {
        anchor2 = a.clone().add(wholeMonthDiff + 1, 'months');
        // linear across the month
        adjust = (b - anchor) / (anchor2 - anchor);
    }

    //check for negative zero, return zero if negative zero
    return -(wholeMonthDiff + adjust) || 0;
}

hooks.defaultFormat = 'YYYY-MM-DDTHH:mm:ssZ';
hooks.defaultFormatUtc = 'YYYY-MM-DDTHH:mm:ss[Z]';

function toString() {
    return this.clone().locale('en').format('ddd MMM DD YYYY HH:mm:ss [GMT]ZZ');
}

function toISOString(keepOffset) {
    if (!this.isValid()) {
        return null;
    }
    var utc = keepOffset !== true,
        m = utc ? this.clone().utc() : this;
    if (m.year() < 0 || m.year() > 9999) {
        return formatMoment(
            m,
            utc
                ? 'YYYYYY-MM-DD[T]HH:mm:ss.SSS[Z]'
                : 'YYYYYY-MM-DD[T]HH:mm:ss.SSSZ'
        );
    }
    if (isFunction(Date.prototype.toISOString)) {
        // native implementation is ~50x faster, use it when we can
        if (utc) {
            return this.toDate().toISOString();
        } else {
            return new Date(this.valueOf() + this.utcOffset() * 60 * 1000)
                .toISOString()
                .replace('Z', formatMoment(m, 'Z'));
        }
    }
    return formatMoment(
        m,
        utc ? 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]' : 'YYYY-MM-DD[T]HH:mm:ss.SSSZ'
    );
}

/**
 * Return a human readable representation of a moment that can
 * also be evaluated to get a new moment which is the same
 *
 * @link https://nodejs.org/dist/latest/docs/api/util.html#util_custom_inspect_function_on_objects
 */
function inspect() {
    if (!this.isValid()) {
        return 'moment.invalid(/* ' + this._i + ' */)';
    }
    var func = 'moment',
        zone = '',
        prefix,
        year,
        datetime,
        suffix;
    if (!this.isLocal()) {
        func = this.utcOffset() === 0 ? 'moment.utc' : 'moment.parseZone';
        zone = 'Z';
    }
    prefix = '[' + func + '("]';
    year = 0 <= this.year() && this.year() <= 9999 ? 'YYYY' : 'YYYYYY';
    datetime = '-MM-DD[T]HH:mm:ss.SSS';
    suffix = zone + '[")]';

    return this.format(prefix + year + datetime + suffix);
}

function format(inputString) {
    if (!inputString) {
        inputString = this.isUtc()
            ? hooks.defaultFormatUtc
            : hooks.defaultFormat;
    }
    var output = formatMoment(this, inputString);
    return this.localeData().postformat(output);
}

function from(time, withoutSuffix) {
    if (
        this.isValid() &&
        ((isMoment(time) && time.isValid()) || createLocal(time).isValid())
    ) {
        return createDuration({ to: this, from: time })
            .locale(this.locale())
            .humanize(!withoutSuffix);
    } else {
        return this.localeData().invalidDate();
    }
}

function fromNow(withoutSuffix) {
    return this.from(createLocal(), withoutSuffix);
}

function to(time, withoutSuffix) {
    if (
        this.isValid() &&
        ((isMoment(time) && time.isValid()) || createLocal(time).isValid())
    ) {
        return createDuration({ from: this, to: time })
            .locale(this.locale())
            .humanize(!withoutSuffix);
    } else {
        return this.localeData().invalidDate();
    }
}

function toNow(withoutSuffix) {
    return this.to(createLocal(), withoutSuffix);
}

// If passed a locale key, it will set the locale for this
// instance.  Otherwise, it will return the locale configuration
// variables for this instance.
function locale(key) {
    var newLocaleData;

    if (key === undefined) {
        return this._locale._abbr;
    } else {
        newLocaleData = getLocale(key);
        if (newLocaleData != null) {
            this._locale = newLocaleData;
        }
        return this;
    }
}

var lang = deprecate(
    'moment().lang() is deprecated. Instead, use moment().localeData() to get the language configuration. Use moment().locale() to change languages.',
    function (key) {
        if (key === undefined) {
            return this.localeData();
        } else {
            return this.locale(key);
        }
    }
);

function localeData() {
    return this._locale;
}

var MS_PER_SECOND = 1000,
    MS_PER_MINUTE = 60 * MS_PER_SECOND,
    MS_PER_HOUR = 60 * MS_PER_MINUTE,
    MS_PER_400_YEARS = (365 * 400 + 97) * 24 * MS_PER_HOUR;

// actual modulo - handles negative numbers (for dates before 1970):
function mod$1(dividend, divisor) {
    return ((dividend % divisor) + divisor) % divisor;
}

function localStartOfDate(y, m, d) {
    // the date constructor remaps years 0-99 to 1900-1999
    if (y < 100 && y >= 0) {
        // preserve leap years using a full 400 year cycle, then reset
        return new Date(y + 400, m, d) - MS_PER_400_YEARS;
    } else {
        return new Date(y, m, d).valueOf();
    }
}

function utcStartOfDate(y, m, d) {
    // Date.UTC remaps years 0-99 to 1900-1999
    if (y < 100 && y >= 0) {
        // preserve leap years using a full 400 year cycle, then reset
        return Date.UTC(y + 400, m, d) - MS_PER_400_YEARS;
    } else {
        return Date.UTC(y, m, d);
    }
}

function startOf(units) {
    var time, startOfDate;
    units = normalizeUnits(units);
    if (units === undefined || units === 'millisecond' || !this.isValid()) {
        return this;
    }

    startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;

    switch (units) {
        case 'year':
            time = startOfDate(this.year(), 0, 1);
            break;
        case 'quarter':
            time = startOfDate(
                this.year(),
                this.month() - (this.month() % 3),
                1
            );
            break;
        case 'month':
            time = startOfDate(this.year(), this.month(), 1);
            break;
        case 'week':
            time = startOfDate(
                this.year(),
                this.month(),
                this.date() - this.weekday()
            );
            break;
        case 'isoWeek':
            time = startOfDate(
                this.year(),
                this.month(),
                this.date() - (this.isoWeekday() - 1)
            );
            break;
        case 'day':
        case 'date':
            time = startOfDate(this.year(), this.month(), this.date());
            break;
        case 'hour':
            time = this._d.valueOf();
            time -= mod$1(
                time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
                MS_PER_HOUR
            );
            break;
        case 'minute':
            time = this._d.valueOf();
            time -= mod$1(time, MS_PER_MINUTE);
            break;
        case 'second':
            time = this._d.valueOf();
            time -= mod$1(time, MS_PER_SECOND);
            break;
    }

    this._d.setTime(time);
    hooks.updateOffset(this, true);
    return this;
}

function endOf(units) {
    var time, startOfDate;
    units = normalizeUnits(units);
    if (units === undefined || units === 'millisecond' || !this.isValid()) {
        return this;
    }

    startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;

    switch (units) {
        case 'year':
            time = startOfDate(this.year() + 1, 0, 1) - 1;
            break;
        case 'quarter':
            time =
                startOfDate(
                    this.year(),
                    this.month() - (this.month() % 3) + 3,
                    1
                ) - 1;
            break;
        case 'month':
            time = startOfDate(this.year(), this.month() + 1, 1) - 1;
            break;
        case 'week':
            time =
                startOfDate(
                    this.year(),
                    this.month(),
                    this.date() - this.weekday() + 7
                ) - 1;
            break;
        case 'isoWeek':
            time =
                startOfDate(
                    this.year(),
                    this.month(),
                    this.date() - (this.isoWeekday() - 1) + 7
                ) - 1;
            break;
        case 'day':
        case 'date':
            time = startOfDate(this.year(), this.month(), this.date() + 1) - 1;
            break;
        case 'hour':
            time = this._d.valueOf();
            time +=
                MS_PER_HOUR -
                mod$1(
                    time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
                    MS_PER_HOUR
                ) -
                1;
            break;
        case 'minute':
            time = this._d.valueOf();
            time += MS_PER_MINUTE - mod$1(time, MS_PER_MINUTE) - 1;
            break;
        case 'second':
            time = this._d.valueOf();
            time += MS_PER_SECOND - mod$1(time, MS_PER_SECOND) - 1;
            break;
    }

    this._d.setTime(time);
    hooks.updateOffset(this, true);
    return this;
}

function valueOf() {
    return this._d.valueOf() - (this._offset || 0) * 60000;
}

function unix() {
    return Math.floor(this.valueOf() / 1000);
}

function toDate() {
    return new Date(this.valueOf());
}

function toArray() {
    var m = this;
    return [
        m.year(),
        m.month(),
        m.date(),
        m.hour(),
        m.minute(),
        m.second(),
        m.millisecond(),
    ];
}

function toObject() {
    var m = this;
    return {
        years: m.year(),
        months: m.month(),
        date: m.date(),
        hours: m.hours(),
        minutes: m.minutes(),
        seconds: m.seconds(),
        milliseconds: m.milliseconds(),
    };
}

function toJSON() {
    // new Date(NaN).toJSON() === null
    return this.isValid() ? this.toISOString() : null;
}

function isValid$2() {
    return isValid(this);
}

function parsingFlags() {
    return extend({}, getParsingFlags(this));
}

function invalidAt() {
    return getParsingFlags(this).overflow;
}

function creationData() {
    return {
        input: this._i,
        format: this._f,
        locale: this._locale,
        isUTC: this._isUTC,
        strict: this._strict,
    };
}

addFormatToken('N', 0, 0, 'eraAbbr');
addFormatToken('NN', 0, 0, 'eraAbbr');
addFormatToken('NNN', 0, 0, 'eraAbbr');
addFormatToken('NNNN', 0, 0, 'eraName');
addFormatToken('NNNNN', 0, 0, 'eraNarrow');

addFormatToken('y', ['y', 1], 'yo', 'eraYear');
addFormatToken('y', ['yy', 2], 0, 'eraYear');
addFormatToken('y', ['yyy', 3], 0, 'eraYear');
addFormatToken('y', ['yyyy', 4], 0, 'eraYear');

addRegexToken('N', matchEraAbbr);
addRegexToken('NN', matchEraAbbr);
addRegexToken('NNN', matchEraAbbr);
addRegexToken('NNNN', matchEraName);
addRegexToken('NNNNN', matchEraNarrow);

addParseToken(['N', 'NN', 'NNN', 'NNNN', 'NNNNN'], function (
    input,
    array,
    config,
    token
) {
    var era = config._locale.erasParse(input, token, config._strict);
    if (era) {
        getParsingFlags(config).era = era;
    } else {
        getParsingFlags(config).invalidEra = input;
    }
});

addRegexToken('y', matchUnsigned);
addRegexToken('yy', matchUnsigned);
addRegexToken('yyy', matchUnsigned);
addRegexToken('yyyy', matchUnsigned);
addRegexToken('yo', matchEraYearOrdinal);

addParseToken(['y', 'yy', 'yyy', 'yyyy'], YEAR);
addParseToken(['yo'], function (input, array, config, token) {
    var match;
    if (config._locale._eraYearOrdinalRegex) {
        match = input.match(config._locale._eraYearOrdinalRegex);
    }

    if (config._locale.eraYearOrdinalParse) {
        array[YEAR] = config._locale.eraYearOrdinalParse(input, match);
    } else {
        array[YEAR] = parseInt(input, 10);
    }
});

function localeEras(m, format) {
    var i,
        l,
        date,
        eras = this._eras || getLocale('en')._eras;
    for (i = 0, l = eras.length; i < l; ++i) {
        switch (typeof eras[i].since) {
            case 'string':
                // truncate time
                date = hooks(eras[i].since).startOf('day');
                eras[i].since = date.valueOf();
                break;
        }

        switch (typeof eras[i].until) {
            case 'undefined':
                eras[i].until = +Infinity;
                break;
            case 'string':
                // truncate time
                date = hooks(eras[i].until).startOf('day').valueOf();
                eras[i].until = date.valueOf();
                break;
        }
    }
    return eras;
}

function localeErasParse(eraName, format, strict) {
    var i,
        l,
        eras = this.eras(),
        name,
        abbr,
        narrow;
    eraName = eraName.toUpperCase();

    for (i = 0, l = eras.length; i < l; ++i) {
        name = eras[i].name.toUpperCase();
        abbr = eras[i].abbr.toUpperCase();
        narrow = eras[i].narrow.toUpperCase();

        if (strict) {
            switch (format) {
                case 'N':
                case 'NN':
                case 'NNN':
                    if (abbr === eraName) {
                        return eras[i];
                    }
                    break;

                case 'NNNN':
                    if (name === eraName) {
                        return eras[i];
                    }
                    break;

                case 'NNNNN':
                    if (narrow === eraName) {
                        return eras[i];
                    }
                    break;
            }
        } else if ([name, abbr, narrow].indexOf(eraName) >= 0) {
            return eras[i];
        }
    }
}

function localeErasConvertYear(era, year) {
    var dir = era.since <= era.until ? +1 : -1;
    if (year === undefined) {
        return hooks(era.since).year();
    } else {
        return hooks(era.since).year() + (year - era.offset) * dir;
    }
}

function getEraName() {
    var i,
        l,
        val,
        eras = this.localeData().eras();
    for (i = 0, l = eras.length; i < l; ++i) {
        // truncate time
        val = this.clone().startOf('day').valueOf();

        if (eras[i].since <= val && val <= eras[i].until) {
            return eras[i].name;
        }
        if (eras[i].until <= val && val <= eras[i].since) {
            return eras[i].name;
        }
    }

    return '';
}

function getEraNarrow() {
    var i,
        l,
        val,
        eras = this.localeData().eras();
    for (i = 0, l = eras.length; i < l; ++i) {
        // truncate time
        val = this.clone().startOf('day').valueOf();

        if (eras[i].since <= val && val <= eras[i].until) {
            return eras[i].narrow;
        }
        if (eras[i].until <= val && val <= eras[i].since) {
            return eras[i].narrow;
        }
    }

    return '';
}

function getEraAbbr() {
    var i,
        l,
        val,
        eras = this.localeData().eras();
    for (i = 0, l = eras.length; i < l; ++i) {
        // truncate time
        val = this.clone().startOf('day').valueOf();

        if (eras[i].since <= val && val <= eras[i].until) {
            return eras[i].abbr;
        }
        if (eras[i].until <= val && val <= eras[i].since) {
            return eras[i].abbr;
        }
    }

    return '';
}

function getEraYear() {
    var i,
        l,
        dir,
        val,
        eras = this.localeData().eras();
    for (i = 0, l = eras.length; i < l; ++i) {
        dir = eras[i].since <= eras[i].until ? +1 : -1;

        // truncate time
        val = this.clone().startOf('day').valueOf();

        if (
            (eras[i].since <= val && val <= eras[i].until) ||
            (eras[i].until <= val && val <= eras[i].since)
        ) {
            return (
                (this.year() - hooks(eras[i].since).year()) * dir +
                eras[i].offset
            );
        }
    }

    return this.year();
}

function erasNameRegex(isStrict) {
    if (!hasOwnProp(this, '_erasNameRegex')) {
        computeErasParse.call(this);
    }
    return isStrict ? this._erasNameRegex : this._erasRegex;
}

function erasAbbrRegex(isStrict) {
    if (!hasOwnProp(this, '_erasAbbrRegex')) {
        computeErasParse.call(this);
    }
    return isStrict ? this._erasAbbrRegex : this._erasRegex;
}

function erasNarrowRegex(isStrict) {
    if (!hasOwnProp(this, '_erasNarrowRegex')) {
        computeErasParse.call(this);
    }
    return isStrict ? this._erasNarrowRegex : this._erasRegex;
}

function matchEraAbbr(isStrict, locale) {
    return locale.erasAbbrRegex(isStrict);
}

function matchEraName(isStrict, locale) {
    return locale.erasNameRegex(isStrict);
}

function matchEraNarrow(isStrict, locale) {
    return locale.erasNarrowRegex(isStrict);
}

function matchEraYearOrdinal(isStrict, locale) {
    return locale._eraYearOrdinalRegex || matchUnsigned;
}

function computeErasParse() {
    var abbrPieces = [],
        namePieces = [],
        narrowPieces = [],
        mixedPieces = [],
        i,
        l,
        eras = this.eras();

    for (i = 0, l = eras.length; i < l; ++i) {
        namePieces.push(regexEscape(eras[i].name));
        abbrPieces.push(regexEscape(eras[i].abbr));
        narrowPieces.push(regexEscape(eras[i].narrow));

        mixedPieces.push(regexEscape(eras[i].name));
        mixedPieces.push(regexEscape(eras[i].abbr));
        mixedPieces.push(regexEscape(eras[i].narrow));
    }

    this._erasRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
    this._erasNameRegex = new RegExp('^(' + namePieces.join('|') + ')', 'i');
    this._erasAbbrRegex = new RegExp('^(' + abbrPieces.join('|') + ')', 'i');
    this._erasNarrowRegex = new RegExp(
        '^(' + narrowPieces.join('|') + ')',
        'i'
    );
}

// FORMATTING

addFormatToken(0, ['gg', 2], 0, function () {
    return this.weekYear() % 100;
});

addFormatToken(0, ['GG', 2], 0, function () {
    return this.isoWeekYear() % 100;
});

function addWeekYearFormatToken(token, getter) {
    addFormatToken(0, [token, token.length], 0, getter);
}

addWeekYearFormatToken('gggg', 'weekYear');
addWeekYearFormatToken('ggggg', 'weekYear');
addWeekYearFormatToken('GGGG', 'isoWeekYear');
addWeekYearFormatToken('GGGGG', 'isoWeekYear');

// ALIASES

addUnitAlias('weekYear', 'gg');
addUnitAlias('isoWeekYear', 'GG');

// PRIORITY

addUnitPriority('weekYear', 1);
addUnitPriority('isoWeekYear', 1);

// PARSING

addRegexToken('G', matchSigned);
addRegexToken('g', matchSigned);
addRegexToken('GG', match1to2, match2);
addRegexToken('gg', match1to2, match2);
addRegexToken('GGGG', match1to4, match4);
addRegexToken('gggg', match1to4, match4);
addRegexToken('GGGGG', match1to6, match6);
addRegexToken('ggggg', match1to6, match6);

addWeekParseToken(['gggg', 'ggggg', 'GGGG', 'GGGGG'], function (
    input,
    week,
    config,
    token
) {
    week[token.substr(0, 2)] = toInt(input);
});

addWeekParseToken(['gg', 'GG'], function (input, week, config, token) {
    week[token] = hooks.parseTwoDigitYear(input);
});

// MOMENTS

function getSetWeekYear(input) {
    return getSetWeekYearHelper.call(
        this,
        input,
        this.week(),
        this.weekday(),
        this.localeData()._week.dow,
        this.localeData()._week.doy
    );
}

function getSetISOWeekYear(input) {
    return getSetWeekYearHelper.call(
        this,
        input,
        this.isoWeek(),
        this.isoWeekday(),
        1,
        4
    );
}

function getISOWeeksInYear() {
    return weeksInYear(this.year(), 1, 4);
}

function getISOWeeksInISOWeekYear() {
    return weeksInYear(this.isoWeekYear(), 1, 4);
}

function getWeeksInYear() {
    var weekInfo = this.localeData()._week;
    return weeksInYear(this.year(), weekInfo.dow, weekInfo.doy);
}

function getWeeksInWeekYear() {
    var weekInfo = this.localeData()._week;
    return weeksInYear(this.weekYear(), weekInfo.dow, weekInfo.doy);
}

function getSetWeekYearHelper(input, week, weekday, dow, doy) {
    var weeksTarget;
    if (input == null) {
        return weekOfYear(this, dow, doy).year;
    } else {
        weeksTarget = weeksInYear(input, dow, doy);
        if (week > weeksTarget) {
            week = weeksTarget;
        }
        return setWeekAll.call(this, input, week, weekday, dow, doy);
    }
}

function setWeekAll(weekYear, week, weekday, dow, doy) {
    var dayOfYearData = dayOfYearFromWeeks(weekYear, week, weekday, dow, doy),
        date = createUTCDate(dayOfYearData.year, 0, dayOfYearData.dayOfYear);

    this.year(date.getUTCFullYear());
    this.month(date.getUTCMonth());
    this.date(date.getUTCDate());
    return this;
}

// FORMATTING

addFormatToken('Q', 0, 'Qo', 'quarter');

// ALIASES

addUnitAlias('quarter', 'Q');

// PRIORITY

addUnitPriority('quarter', 7);

// PARSING

addRegexToken('Q', match1);
addParseToken('Q', function (input, array) {
    array[MONTH] = (toInt(input) - 1) * 3;
});

// MOMENTS

function getSetQuarter(input) {
    return input == null
        ? Math.ceil((this.month() + 1) / 3)
        : this.month((input - 1) * 3 + (this.month() % 3));
}

// FORMATTING

addFormatToken('D', ['DD', 2], 'Do', 'date');

// ALIASES

addUnitAlias('date', 'D');

// PRIORITY
addUnitPriority('date', 9);

// PARSING

addRegexToken('D', match1to2);
addRegexToken('DD', match1to2, match2);
addRegexToken('Do', function (isStrict, locale) {
    // TODO: Remove "ordinalParse" fallback in next major release.
    return isStrict
        ? locale._dayOfMonthOrdinalParse || locale._ordinalParse
        : locale._dayOfMonthOrdinalParseLenient;
});

addParseToken(['D', 'DD'], DATE);
addParseToken('Do', function (input, array) {
    array[DATE] = toInt(input.match(match1to2)[0]);
});

// MOMENTS

var getSetDayOfMonth = makeGetSet('Date', true);

// FORMATTING

addFormatToken('DDD', ['DDDD', 3], 'DDDo', 'dayOfYear');

// ALIASES

addUnitAlias('dayOfYear', 'DDD');

// PRIORITY
addUnitPriority('dayOfYear', 4);

// PARSING

addRegexToken('DDD', match1to3);
addRegexToken('DDDD', match3);
addParseToken(['DDD', 'DDDD'], function (input, array, config) {
    config._dayOfYear = toInt(input);
});

// HELPERS

// MOMENTS

function getSetDayOfYear(input) {
    var dayOfYear =
        Math.round(
            (this.clone().startOf('day') - this.clone().startOf('year')) / 864e5
        ) + 1;
    return input == null ? dayOfYear : this.add(input - dayOfYear, 'd');
}

// FORMATTING

addFormatToken('m', ['mm', 2], 0, 'minute');

// ALIASES

addUnitAlias('minute', 'm');

// PRIORITY

addUnitPriority('minute', 14);

// PARSING

addRegexToken('m', match1to2);
addRegexToken('mm', match1to2, match2);
addParseToken(['m', 'mm'], MINUTE);

// MOMENTS

var getSetMinute = makeGetSet('Minutes', false);

// FORMATTING

addFormatToken('s', ['ss', 2], 0, 'second');

// ALIASES

addUnitAlias('second', 's');

// PRIORITY

addUnitPriority('second', 15);

// PARSING

addRegexToken('s', match1to2);
addRegexToken('ss', match1to2, match2);
addParseToken(['s', 'ss'], SECOND);

// MOMENTS

var getSetSecond = makeGetSet('Seconds', false);

// FORMATTING

addFormatToken('S', 0, 0, function () {
    return ~~(this.millisecond() / 100);
});

addFormatToken(0, ['SS', 2], 0, function () {
    return ~~(this.millisecond() / 10);
});

addFormatToken(0, ['SSS', 3], 0, 'millisecond');
addFormatToken(0, ['SSSS', 4], 0, function () {
    return this.millisecond() * 10;
});
addFormatToken(0, ['SSSSS', 5], 0, function () {
    return this.millisecond() * 100;
});
addFormatToken(0, ['SSSSSS', 6], 0, function () {
    return this.millisecond() * 1000;
});
addFormatToken(0, ['SSSSSSS', 7], 0, function () {
    return this.millisecond() * 10000;
});
addFormatToken(0, ['SSSSSSSS', 8], 0, function () {
    return this.millisecond() * 100000;
});
addFormatToken(0, ['SSSSSSSSS', 9], 0, function () {
    return this.millisecond() * 1000000;
});

// ALIASES

addUnitAlias('millisecond', 'ms');

// PRIORITY

addUnitPriority('millisecond', 16);

// PARSING

addRegexToken('S', match1to3, match1);
addRegexToken('SS', match1to3, match2);
addRegexToken('SSS', match1to3, match3);

var token, getSetMillisecond;
for (token = 'SSSS'; token.length <= 9; token += 'S') {
    addRegexToken(token, matchUnsigned);
}

function parseMs(input, array) {
    array[MILLISECOND] = toInt(('0.' + input) * 1000);
}

for (token = 'S'; token.length <= 9; token += 'S') {
    addParseToken(token, parseMs);
}

getSetMillisecond = makeGetSet('Milliseconds', false);

// FORMATTING

addFormatToken('z', 0, 0, 'zoneAbbr');
addFormatToken('zz', 0, 0, 'zoneName');

// MOMENTS

function getZoneAbbr() {
    return this._isUTC ? 'UTC' : '';
}

function getZoneName() {
    return this._isUTC ? 'Coordinated Universal Time' : '';
}

var proto = Moment.prototype;

proto.add = add;
proto.calendar = calendar$1;
proto.clone = clone;
proto.diff = diff;
proto.endOf = endOf;
proto.format = format;
proto.from = from;
proto.fromNow = fromNow;
proto.to = to;
proto.toNow = toNow;
proto.get = stringGet;
proto.invalidAt = invalidAt;
proto.isAfter = isAfter;
proto.isBefore = isBefore;
proto.isBetween = isBetween;
proto.isSame = isSame;
proto.isSameOrAfter = isSameOrAfter;
proto.isSameOrBefore = isSameOrBefore;
proto.isValid = isValid$2;
proto.lang = lang;
proto.locale = locale;
proto.localeData = localeData;
proto.max = prototypeMax;
proto.min = prototypeMin;
proto.parsingFlags = parsingFlags;
proto.set = stringSet;
proto.startOf = startOf;
proto.subtract = subtract;
proto.toArray = toArray;
proto.toObject = toObject;
proto.toDate = toDate;
proto.toISOString = toISOString;
proto.inspect = inspect;
if (typeof Symbol !== 'undefined' && Symbol.for != null) {
    proto[Symbol.for('nodejs.util.inspect.custom')] = function () {
        return 'Moment<' + this.format() + '>';
    };
}
proto.toJSON = toJSON;
proto.toString = toString;
proto.unix = unix;
proto.valueOf = valueOf;
proto.creationData = creationData;
proto.eraName = getEraName;
proto.eraNarrow = getEraNarrow;
proto.eraAbbr = getEraAbbr;
proto.eraYear = getEraYear;
proto.year = getSetYear;
proto.isLeapYear = getIsLeapYear;
proto.weekYear = getSetWeekYear;
proto.isoWeekYear = getSetISOWeekYear;
proto.quarter = proto.quarters = getSetQuarter;
proto.month = getSetMonth;
proto.daysInMonth = getDaysInMonth;
proto.week = proto.weeks = getSetWeek;
proto.isoWeek = proto.isoWeeks = getSetISOWeek;
proto.weeksInYear = getWeeksInYear;
proto.weeksInWeekYear = getWeeksInWeekYear;
proto.isoWeeksInYear = getISOWeeksInYear;
proto.isoWeeksInISOWeekYear = getISOWeeksInISOWeekYear;
proto.date = getSetDayOfMonth;
proto.day = proto.days = getSetDayOfWeek;
proto.weekday = getSetLocaleDayOfWeek;
proto.isoWeekday = getSetISODayOfWeek;
proto.dayOfYear = getSetDayOfYear;
proto.hour = proto.hours = getSetHour;
proto.minute = proto.minutes = getSetMinute;
proto.second = proto.seconds = getSetSecond;
proto.millisecond = proto.milliseconds = getSetMillisecond;
proto.utcOffset = getSetOffset;
proto.utc = setOffsetToUTC;
proto.local = setOffsetToLocal;
proto.parseZone = setOffsetToParsedOffset;
proto.hasAlignedHourOffset = hasAlignedHourOffset;
proto.isDST = isDaylightSavingTime;
proto.isLocal = isLocal;
proto.isUtcOffset = isUtcOffset;
proto.isUtc = isUtc;
proto.isUTC = isUtc;
proto.zoneAbbr = getZoneAbbr;
proto.zoneName = getZoneName;
proto.dates = deprecate(
    'dates accessor is deprecated. Use date instead.',
    getSetDayOfMonth
);
proto.months = deprecate(
    'months accessor is deprecated. Use month instead',
    getSetMonth
);
proto.years = deprecate(
    'years accessor is deprecated. Use year instead',
    getSetYear
);
proto.zone = deprecate(
    'moment().zone is deprecated, use moment().utcOffset instead. http://momentjs.com/guides/#/warnings/zone/',
    getSetZone
);
proto.isDSTShifted = deprecate(
    'isDSTShifted is deprecated. See http://momentjs.com/guides/#/warnings/dst-shifted/ for more information',
    isDaylightSavingTimeShifted
);

function createUnix(input) {
    return createLocal(input * 1000);
}

function createInZone() {
    return createLocal.apply(null, arguments).parseZone();
}

function preParsePostFormat(string) {
    return string;
}

var proto$1 = Locale.prototype;

proto$1.calendar = calendar;
proto$1.longDateFormat = longDateFormat;
proto$1.invalidDate = invalidDate;
proto$1.ordinal = ordinal;
proto$1.preparse = preParsePostFormat;
proto$1.postformat = preParsePostFormat;
proto$1.relativeTime = relativeTime;
proto$1.pastFuture = pastFuture;
proto$1.set = set;
proto$1.eras = localeEras;
proto$1.erasParse = localeErasParse;
proto$1.erasConvertYear = localeErasConvertYear;
proto$1.erasAbbrRegex = erasAbbrRegex;
proto$1.erasNameRegex = erasNameRegex;
proto$1.erasNarrowRegex = erasNarrowRegex;

proto$1.months = localeMonths;
proto$1.monthsShort = localeMonthsShort;
proto$1.monthsParse = localeMonthsParse;
proto$1.monthsRegex = monthsRegex;
proto$1.monthsShortRegex = monthsShortRegex;
proto$1.week = localeWeek;
proto$1.firstDayOfYear = localeFirstDayOfYear;
proto$1.firstDayOfWeek = localeFirstDayOfWeek;

proto$1.weekdays = localeWeekdays;
proto$1.weekdaysMin = localeWeekdaysMin;
proto$1.weekdaysShort = localeWeekdaysShort;
proto$1.weekdaysParse = localeWeekdaysParse;

proto$1.weekdaysRegex = weekdaysRegex;
proto$1.weekdaysShortRegex = weekdaysShortRegex;
proto$1.weekdaysMinRegex = weekdaysMinRegex;

proto$1.isPM = localeIsPM;
proto$1.meridiem = localeMeridiem;

function get$1(format, index, field, setter) {
    var locale = getLocale(),
        utc = createUTC().set(setter, index);
    return locale[field](utc, format);
}

function listMonthsImpl(format, index, field) {
    if (isNumber(format)) {
        index = format;
        format = undefined;
    }

    format = format || '';

    if (index != null) {
        return get$1(format, index, field, 'month');
    }

    var i,
        out = [];
    for (i = 0; i < 12; i++) {
        out[i] = get$1(format, i, field, 'month');
    }
    return out;
}

// ()
// (5)
// (fmt, 5)
// (fmt)
// (true)
// (true, 5)
// (true, fmt, 5)
// (true, fmt)
function listWeekdaysImpl(localeSorted, format, index, field) {
    if (typeof localeSorted === 'boolean') {
        if (isNumber(format)) {
            index = format;
            format = undefined;
        }

        format = format || '';
    } else {
        format = localeSorted;
        index = format;
        localeSorted = false;

        if (isNumber(format)) {
            index = format;
            format = undefined;
        }

        format = format || '';
    }

    var locale = getLocale(),
        shift = localeSorted ? locale._week.dow : 0,
        i,
        out = [];

    if (index != null) {
        return get$1(format, (index + shift) % 7, field, 'day');
    }

    for (i = 0; i < 7; i++) {
        out[i] = get$1(format, (i + shift) % 7, field, 'day');
    }
    return out;
}

function listMonths(format, index) {
    return listMonthsImpl(format, index, 'months');
}

function listMonthsShort(format, index) {
    return listMonthsImpl(format, index, 'monthsShort');
}

function listWeekdays(localeSorted, format, index) {
    return listWeekdaysImpl(localeSorted, format, index, 'weekdays');
}

function listWeekdaysShort(localeSorted, format, index) {
    return listWeekdaysImpl(localeSorted, format, index, 'weekdaysShort');
}

function listWeekdaysMin(localeSorted, format, index) {
    return listWeekdaysImpl(localeSorted, format, index, 'weekdaysMin');
}

getSetGlobalLocale('en', {
    eras: [
        {
            since: '0001-01-01',
            until: +Infinity,
            offset: 1,
            name: 'Anno Domini',
            narrow: 'AD',
            abbr: 'AD',
        },
        {
            since: '0000-12-31',
            until: -Infinity,
            offset: 1,
            name: 'Before Christ',
            narrow: 'BC',
            abbr: 'BC',
        },
    ],
    dayOfMonthOrdinalParse: /\d{1,2}(th|st|nd|rd)/,
    ordinal: function (number) {
        var b = number % 10,
            output =
                toInt((number % 100) / 10) === 1
                    ? 'th'
                    : b === 1
                    ? 'st'
                    : b === 2
                    ? 'nd'
                    : b === 3
                    ? 'rd'
                    : 'th';
        return number + output;
    },
});

// Side effect imports

hooks.lang = deprecate(
    'moment.lang is deprecated. Use moment.locale instead.',
    getSetGlobalLocale
);
hooks.langData = deprecate(
    'moment.langData is deprecated. Use moment.localeData instead.',
    getLocale
);

var mathAbs = Math.abs;

function abs() {
    var data = this._data;

    this._milliseconds = mathAbs(this._milliseconds);
    this._days = mathAbs(this._days);
    this._months = mathAbs(this._months);

    data.milliseconds = mathAbs(data.milliseconds);
    data.seconds = mathAbs(data.seconds);
    data.minutes = mathAbs(data.minutes);
    data.hours = mathAbs(data.hours);
    data.months = mathAbs(data.months);
    data.years = mathAbs(data.years);

    return this;
}

function addSubtract$1(duration, input, value, direction) {
    var other = createDuration(input, value);

    duration._milliseconds += direction * other._milliseconds;
    duration._days += direction * other._days;
    duration._months += direction * other._months;

    return duration._bubble();
}

// supports only 2.0-style add(1, 's') or add(duration)
function add$1(input, value) {
    return addSubtract$1(this, input, value, 1);
}

// supports only 2.0-style subtract(1, 's') or subtract(duration)
function subtract$1(input, value) {
    return addSubtract$1(this, input, value, -1);
}

function absCeil(number) {
    if (number < 0) {
        return Math.floor(number);
    } else {
        return Math.ceil(number);
    }
}

function bubble() {
    var milliseconds = this._milliseconds,
        days = this._days,
        months = this._months,
        data = this._data,
        seconds,
        minutes,
        hours,
        years,
        monthsFromDays;

    // if we have a mix of positive and negative values, bubble down first
    // check: https://github.com/moment/moment/issues/2166
    if (
        !(
            (milliseconds >= 0 && days >= 0 && months >= 0) ||
            (milliseconds <= 0 && days <= 0 && months <= 0)
        )
    ) {
        milliseconds += absCeil(monthsToDays(months) + days) * 864e5;
        days = 0;
        months = 0;
    }

    // The following code bubbles up values, see the tests for
    // examples of what that means.
    data.milliseconds = milliseconds % 1000;

    seconds = absFloor(milliseconds / 1000);
    data.seconds = seconds % 60;

    minutes = absFloor(seconds / 60);
    data.minutes = minutes % 60;

    hours = absFloor(minutes / 60);
    data.hours = hours % 24;

    days += absFloor(hours / 24);

    // convert days to months
    monthsFromDays = absFloor(daysToMonths(days));
    months += monthsFromDays;
    days -= absCeil(monthsToDays(monthsFromDays));

    // 12 months -> 1 year
    years = absFloor(months / 12);
    months %= 12;

    data.days = days;
    data.months = months;
    data.years = years;

    return this;
}

function daysToMonths(days) {
    // 400 years have 146097 days (taking into account leap year rules)
    // 400 years have 12 months === 4800
    return (days * 4800) / 146097;
}

function monthsToDays(months) {
    // the reverse of daysToMonths
    return (months * 146097) / 4800;
}

function as(units) {
    if (!this.isValid()) {
        return NaN;
    }
    var days,
        months,
        milliseconds = this._milliseconds;

    units = normalizeUnits(units);

    if (units === 'month' || units === 'quarter' || units === 'year') {
        days = this._days + milliseconds / 864e5;
        months = this._months + daysToMonths(days);
        switch (units) {
            case 'month':
                return months;
            case 'quarter':
                return months / 3;
            case 'year':
                return months / 12;
        }
    } else {
        // handle milliseconds separately because of floating point math errors (issue #1867)
        days = this._days + Math.round(monthsToDays(this._months));
        switch (units) {
            case 'week':
                return days / 7 + milliseconds / 6048e5;
            case 'day':
                return days + milliseconds / 864e5;
            case 'hour':
                return days * 24 + milliseconds / 36e5;
            case 'minute':
                return days * 1440 + milliseconds / 6e4;
            case 'second':
                return days * 86400 + milliseconds / 1000;
            // Math.floor prevents floating point math errors here
            case 'millisecond':
                return Math.floor(days * 864e5) + milliseconds;
            default:
                throw new Error('Unknown unit ' + units);
        }
    }
}

// TODO: Use this.as('ms')?
function valueOf$1() {
    if (!this.isValid()) {
        return NaN;
    }
    return (
        this._milliseconds +
        this._days * 864e5 +
        (this._months % 12) * 2592e6 +
        toInt(this._months / 12) * 31536e6
    );
}

function makeAs(alias) {
    return function () {
        return this.as(alias);
    };
}

var asMilliseconds = makeAs('ms'),
    asSeconds = makeAs('s'),
    asMinutes = makeAs('m'),
    asHours = makeAs('h'),
    asDays = makeAs('d'),
    asWeeks = makeAs('w'),
    asMonths = makeAs('M'),
    asQuarters = makeAs('Q'),
    asYears = makeAs('y');

function clone$1() {
    return createDuration(this);
}

function get$2(units) {
    units = normalizeUnits(units);
    return this.isValid() ? this[units + 's']() : NaN;
}

function makeGetter(name) {
    return function () {
        return this.isValid() ? this._data[name] : NaN;
    };
}

var milliseconds = makeGetter('milliseconds'),
    seconds = makeGetter('seconds'),
    minutes = makeGetter('minutes'),
    hours = makeGetter('hours'),
    days = makeGetter('days'),
    months = makeGetter('months'),
    years = makeGetter('years');

function weeks() {
    return absFloor(this.days() / 7);
}

var round = Math.round,
    thresholds = {
        ss: 44, // a few seconds to seconds
        s: 45, // seconds to minute
        m: 45, // minutes to hour
        h: 22, // hours to day
        d: 26, // days to month/week
        w: null, // weeks to month
        M: 11, // months to year
    };

// helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
function substituteTimeAgo(string, number, withoutSuffix, isFuture, locale) {
    return locale.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
}

function relativeTime$1(posNegDuration, withoutSuffix, thresholds, locale) {
    var duration = createDuration(posNegDuration).abs(),
        seconds = round(duration.as('s')),
        minutes = round(duration.as('m')),
        hours = round(duration.as('h')),
        days = round(duration.as('d')),
        months = round(duration.as('M')),
        weeks = round(duration.as('w')),
        years = round(duration.as('y')),
        a =
            (seconds <= thresholds.ss && ['s', seconds]) ||
            (seconds < thresholds.s && ['ss', seconds]) ||
            (minutes <= 1 && ['m']) ||
            (minutes < thresholds.m && ['mm', minutes]) ||
            (hours <= 1 && ['h']) ||
            (hours < thresholds.h && ['hh', hours]) ||
            (days <= 1 && ['d']) ||
            (days < thresholds.d && ['dd', days]);

    if (thresholds.w != null) {
        a =
            a ||
            (weeks <= 1 && ['w']) ||
            (weeks < thresholds.w && ['ww', weeks]);
    }
    a = a ||
        (months <= 1 && ['M']) ||
        (months < thresholds.M && ['MM', months]) ||
        (years <= 1 && ['y']) || ['yy', years];

    a[2] = withoutSuffix;
    a[3] = +posNegDuration > 0;
    a[4] = locale;
    return substituteTimeAgo.apply(null, a);
}

// This function allows you to set the rounding function for relative time strings
function getSetRelativeTimeRounding(roundingFunction) {
    if (roundingFunction === undefined) {
        return round;
    }
    if (typeof roundingFunction === 'function') {
        round = roundingFunction;
        return true;
    }
    return false;
}

// This function allows you to set a threshold for relative time strings
function getSetRelativeTimeThreshold(threshold, limit) {
    if (thresholds[threshold] === undefined) {
        return false;
    }
    if (limit === undefined) {
        return thresholds[threshold];
    }
    thresholds[threshold] = limit;
    if (threshold === 's') {
        thresholds.ss = limit - 1;
    }
    return true;
}

function humanize(argWithSuffix, argThresholds) {
    if (!this.isValid()) {
        return this.localeData().invalidDate();
    }

    var withSuffix = false,
        th = thresholds,
        locale,
        output;

    if (typeof argWithSuffix === 'object') {
        argThresholds = argWithSuffix;
        argWithSuffix = false;
    }
    if (typeof argWithSuffix === 'boolean') {
        withSuffix = argWithSuffix;
    }
    if (typeof argThresholds === 'object') {
        th = Object.assign({}, thresholds, argThresholds);
        if (argThresholds.s != null && argThresholds.ss == null) {
            th.ss = argThresholds.s - 1;
        }
    }

    locale = this.localeData();
    output = relativeTime$1(this, !withSuffix, th, locale);

    if (withSuffix) {
        output = locale.pastFuture(+this, output);
    }

    return locale.postformat(output);
}

var abs$1 = Math.abs;

function sign(x) {
    return (x > 0) - (x < 0) || +x;
}

function toISOString$1() {
    // for ISO strings we do not use the normal bubbling rules:
    //  * milliseconds bubble up until they become hours
    //  * days do not bubble at all
    //  * months bubble up until they become years
    // This is because there is no context-free conversion between hours and days
    // (think of clock changes)
    // and also not between days and months (28-31 days per month)
    if (!this.isValid()) {
        return this.localeData().invalidDate();
    }

    var seconds = abs$1(this._milliseconds) / 1000,
        days = abs$1(this._days),
        months = abs$1(this._months),
        minutes,
        hours,
        years,
        s,
        total = this.asSeconds(),
        totalSign,
        ymSign,
        daysSign,
        hmsSign;

    if (!total) {
        // this is the same as C#'s (Noda) and python (isodate)...
        // but not other JS (goog.date)
        return 'P0D';
    }

    // 3600 seconds -> 60 minutes -> 1 hour
    minutes = absFloor(seconds / 60);
    hours = absFloor(minutes / 60);
    seconds %= 60;
    minutes %= 60;

    // 12 months -> 1 year
    years = absFloor(months / 12);
    months %= 12;

    // inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
    s = seconds ? seconds.toFixed(3).replace(/\.?0+$/, '') : '';

    totalSign = total < 0 ? '-' : '';
    ymSign = sign(this._months) !== sign(total) ? '-' : '';
    daysSign = sign(this._days) !== sign(total) ? '-' : '';
    hmsSign = sign(this._milliseconds) !== sign(total) ? '-' : '';

    return (
        totalSign +
        'P' +
        (years ? ymSign + years + 'Y' : '') +
        (months ? ymSign + months + 'M' : '') +
        (days ? daysSign + days + 'D' : '') +
        (hours || minutes || seconds ? 'T' : '') +
        (hours ? hmsSign + hours + 'H' : '') +
        (minutes ? hmsSign + minutes + 'M' : '') +
        (seconds ? hmsSign + s + 'S' : '')
    );
}

var proto$2 = Duration.prototype;

proto$2.isValid = isValid$1;
proto$2.abs = abs;
proto$2.add = add$1;
proto$2.subtract = subtract$1;
proto$2.as = as;
proto$2.asMilliseconds = asMilliseconds;
proto$2.asSeconds = asSeconds;
proto$2.asMinutes = asMinutes;
proto$2.asHours = asHours;
proto$2.asDays = asDays;
proto$2.asWeeks = asWeeks;
proto$2.asMonths = asMonths;
proto$2.asQuarters = asQuarters;
proto$2.asYears = asYears;
proto$2.valueOf = valueOf$1;
proto$2._bubble = bubble;
proto$2.clone = clone$1;
proto$2.get = get$2;
proto$2.milliseconds = milliseconds;
proto$2.seconds = seconds;
proto$2.minutes = minutes;
proto$2.hours = hours;
proto$2.days = days;
proto$2.weeks = weeks;
proto$2.months = months;
proto$2.years = years;
proto$2.humanize = humanize;
proto$2.toISOString = toISOString$1;
proto$2.toString = toISOString$1;
proto$2.toJSON = toISOString$1;
proto$2.locale = locale;
proto$2.localeData = localeData;

proto$2.toIsoString = deprecate(
    'toIsoString() is deprecated. Please use toISOString() instead (notice the capitals)',
    toISOString$1
);
proto$2.lang = lang;

// FORMATTING

addFormatToken('X', 0, 0, 'unix');
addFormatToken('x', 0, 0, 'valueOf');

// PARSING

addRegexToken('x', matchSigned);
addRegexToken('X', matchTimestamp);
addParseToken('X', function (input, array, config) {
    config._d = new Date(parseFloat(input) * 1000);
});
addParseToken('x', function (input, array, config) {
    config._d = new Date(toInt(input));
});

//! moment.js

hooks.version = '2.29.1';

setHookCallback(createLocal);

hooks.fn = proto;
hooks.min = min;
hooks.max = max;
hooks.now = now;
hooks.utc = createUTC;
hooks.unix = createUnix;
hooks.months = listMonths;
hooks.isDate = isDate;
hooks.locale = getSetGlobalLocale;
hooks.invalid = createInvalid;
hooks.duration = createDuration;
hooks.isMoment = isMoment;
hooks.weekdays = listWeekdays;
hooks.parseZone = createInZone;
hooks.localeData = getLocale;
hooks.isDuration = isDuration;
hooks.monthsShort = listMonthsShort;
hooks.weekdaysMin = listWeekdaysMin;
hooks.defineLocale = defineLocale;
hooks.updateLocale = updateLocale;
hooks.locales = listLocales;
hooks.weekdaysShort = listWeekdaysShort;
hooks.normalizeUnits = normalizeUnits;
hooks.relativeTimeRounding = getSetRelativeTimeRounding;
hooks.relativeTimeThreshold = getSetRelativeTimeThreshold;
hooks.calendarFormat = getCalendarFormat;
hooks.prototype = proto;

// currently HTML5 input type only supports 24-hour formats
hooks.HTML5_FMT = {
    DATETIME_LOCAL: 'YYYY-MM-DDTHH:mm', // <input type="datetime-local" />
    DATETIME_LOCAL_SECONDS: 'YYYY-MM-DDTHH:mm:ss', // <input type="datetime-local" step="1" />
    DATETIME_LOCAL_MS: 'YYYY-MM-DDTHH:mm:ss.SSS', // <input type="datetime-local" step="0.001" />
    DATE: 'YYYY-MM-DD', // <input type="date" />
    TIME: 'HH:mm', // <input type="time" />
    TIME_SECONDS: 'HH:mm:ss', // <input type="time" step="1" />
    TIME_MS: 'HH:mm:ss.SSS', // <input type="time" step="0.001" />
    WEEK: 'GGGG-[W]WW', // <input type="week" />
    MONTH: 'YYYY-MM', // <input type="month" />
};

export default hooks;