//! moment.js //! version : 2.9.0 //! authors : Tim Wood, Iskren Chernev, Moment.js contributors //! license : MIT //! momentjs.com

(function (undefined) {

/************************************
    Constants
************************************/

var moment,
    VERSION = '2.9.0',
    // the global-scope this is NOT the global object in Node.js
    globalScope = (typeof global !== 'undefined' && (typeof window === 'undefined' || window === global.window)) ? global : this,
    oldGlobalMoment,
    round = Math.round,
    hasOwnProperty = Object.prototype.hasOwnProperty,
    i,

    YEAR = 0,
    MONTH = 1,
    DATE = 2,
    HOUR = 3,
    MINUTE = 4,
    SECOND = 5,
    MILLISECOND = 6,

    // internal storage for locale config files
    locales = {},

    // extra moment internal properties (plugins register props here)
    momentProperties = [],

    // check for nodeJS
    hasModule = (typeof module !== 'undefined' && module && module.exports),

    // ASP.NET json date format regex
    aspNetJsonRegex = /^\/?Date\((\-?\d+)/i,
    aspNetTimeSpanJsonRegex = /(\-)?(?:(\d*)\.)?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/,

    // 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
    isoDurationRegex = /^(-)?P(?:(?:([0-9,.]*)Y)?(?:([0-9,.]*)M)?(?:([0-9,.]*)D)?(?:T(?:([0-9,.]*)H)?(?:([0-9,.]*)M)?(?:([0-9,.]*)S)?)?|([0-9,.]*)W)$/,

    // format tokens
    formattingTokens = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|Q|YYYYYY|YYYYY|YYYY|YY|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|mm?|ss?|S{1,4}|x|X|zz?|ZZ?|.)/g,
    localFormattingTokens = /(\[[^\[]*\])|(\\)?(LTS|LT|LL?L?L?|l{1,4})/g,

    // parsing token regexes
    parseTokenOneOrTwoDigits = /\d\d?/, // 0 - 99
    parseTokenOneToThreeDigits = /\d{1,3}/, // 0 - 999
    parseTokenOneToFourDigits = /\d{1,4}/, // 0 - 9999
    parseTokenOneToSixDigits = /[+\-]?\d{1,6}/, // -999,999 - 999,999
    parseTokenDigits = /\d+/, // nonzero number of digits
    parseTokenWord = /[0-9]*['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+|[\u0600-\u06FF\/]+(\s*?[\u0600-\u06FF]+){1,2}/i, // any word (or two) characters or numbers including two/three word month in arabic.
    parseTokenTimezone = /Z|[\+\-]\d\d:?\d\d/gi, // +00:00 -00:00 +0000 -0000 or Z
    parseTokenT = /T/i, // T (ISO separator)
    parseTokenOffsetMs = /[\+\-]?\d+/, // 1234567890123
    parseTokenTimestampMs = /[\+\-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123

    //strict parsing regexes
    parseTokenOneDigit = /\d/, // 0 - 9
    parseTokenTwoDigits = /\d\d/, // 00 - 99
    parseTokenThreeDigits = /\d{3}/, // 000 - 999
    parseTokenFourDigits = /\d{4}/, // 0000 - 9999
    parseTokenSixDigits = /[+-]?\d{6}/, // -999,999 - 999,999
    parseTokenSignedNumber = /[+-]?\d+/, // -inf - inf

    // 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)
    isoRegex = /^\s*(?:[+-]\d{6}|\d{4})-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?([\+\-]\d\d(?::?\d\d)?|\s*Z)?)?$/,

    isoFormat = 'YYYY-MM-DDTHH:mm:ssZ',

    isoDates = [
        ['YYYYYY-MM-DD', /[+-]\d{6}-\d{2}-\d{2}/],
        ['YYYY-MM-DD', /\d{4}-\d{2}-\d{2}/],
        ['GGGG-[W]WW-E', /\d{4}-W\d{2}-\d/],
        ['GGGG-[W]WW', /\d{4}-W\d{2}/],
        ['YYYY-DDD', /\d{4}-\d{3}/]
    ],

    // iso time formats and regexes
    isoTimes = [
        ['HH:mm:ss.SSSS', /(T| )\d\d:\d\d:\d\d\.\d+/],
        ['HH:mm:ss', /(T| )\d\d:\d\d:\d\d/],
        ['HH:mm', /(T| )\d\d:\d\d/],
        ['HH', /(T| )\d\d/]
    ],

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

    // getter and setter names
    proxyGettersAndSetters = 'Date|Hours|Minutes|Seconds|Milliseconds'.split('|'),
    unitMillisecondFactors = {
        'Milliseconds' : 1,
        'Seconds' : 1e3,
        'Minutes' : 6e4,
        'Hours' : 36e5,
        'Days' : 864e5,
        'Months' : 2592e6,
        'Years' : 31536e6
    },

    unitAliases = {
        ms : 'millisecond',
        s : 'second',
        m : 'minute',
        h : 'hour',
        d : 'day',
        D : 'date',
        w : 'week',
        W : 'isoWeek',
        M : 'month',
        Q : 'quarter',
        y : 'year',
        DDD : 'dayOfYear',
        e : 'weekday',
        E : 'isoWeekday',
        gg: 'weekYear',
        GG: 'isoWeekYear'
    },

    camelFunctions = {
        dayofyear : 'dayOfYear',
        isoweekday : 'isoWeekday',
        isoweek : 'isoWeek',
        weekyear : 'weekYear',
        isoweekyear : 'isoWeekYear'
    },

    // format function strings
    formatFunctions = {},

    // default relative time thresholds
    relativeTimeThresholds = {
        s: 45,  // seconds to minute
        m: 45,  // minutes to hour
        h: 22,  // hours to day
        d: 26,  // days to month
        M: 11   // months to year
    },

    // tokens to ordinalize and pad
    ordinalizeTokens = 'DDD w W M D d'.split(' '),
    paddedTokens = 'M D H h m s w W'.split(' '),

    formatTokenFunctions = {
        M    : function () {
            return this.month() + 1;
        },
        MMM  : function (format) {
            return this.localeData().monthsShort(this, format);
        },
        MMMM : function (format) {
            return this.localeData().months(this, format);
        },
        D    : function () {
            return this.date();
        },
        DDD  : function () {
            return this.dayOfYear();
        },
        d    : function () {
            return this.day();
        },
        dd   : function (format) {
            return this.localeData().weekdaysMin(this, format);
        },
        ddd  : function (format) {
            return this.localeData().weekdaysShort(this, format);
        },
        dddd : function (format) {
            return this.localeData().weekdays(this, format);
        },
        w    : function () {
            return this.week();
        },
        W    : function () {
            return this.isoWeek();
        },
        YY   : function () {
            return leftZeroFill(this.year() % 100, 2);
        },
        YYYY : function () {
            return leftZeroFill(this.year(), 4);
        },
        YYYYY : function () {
            return leftZeroFill(this.year(), 5);
        },
        YYYYYY : function () {
            var y = this.year(), sign = y >= 0 ? '+' : '-';
            return sign + leftZeroFill(Math.abs(y), 6);
        },
        gg   : function () {
            return leftZeroFill(this.weekYear() % 100, 2);
        },
        gggg : function () {
            return leftZeroFill(this.weekYear(), 4);
        },
        ggggg : function () {
            return leftZeroFill(this.weekYear(), 5);
        },
        GG   : function () {
            return leftZeroFill(this.isoWeekYear() % 100, 2);
        },
        GGGG : function () {
            return leftZeroFill(this.isoWeekYear(), 4);
        },
        GGGGG : function () {
            return leftZeroFill(this.isoWeekYear(), 5);
        },
        e : function () {
            return this.weekday();
        },
        E : function () {
            return this.isoWeekday();
        },
        a    : function () {
            return this.localeData().meridiem(this.hours(), this.minutes(), true);
        },
        A    : function () {
            return this.localeData().meridiem(this.hours(), this.minutes(), false);
        },
        H    : function () {
            return this.hours();
        },
        h    : function () {
            return this.hours() % 12 || 12;
        },
        m    : function () {
            return this.minutes();
        },
        s    : function () {
            return this.seconds();
        },
        S    : function () {
            return toInt(this.milliseconds() / 100);
        },
        SS   : function () {
            return leftZeroFill(toInt(this.milliseconds() / 10), 2);
        },
        SSS  : function () {
            return leftZeroFill(this.milliseconds(), 3);
        },
        SSSS : function () {
            return leftZeroFill(this.milliseconds(), 3);
        },
        Z    : function () {
            var a = this.utcOffset(),
                b = '+';
            if (a < 0) {
                a = -a;
                b = '-';
            }
            return b + leftZeroFill(toInt(a / 60), 2) + ':' + leftZeroFill(toInt(a) % 60, 2);
        },
        ZZ   : function () {
            var a = this.utcOffset(),
                b = '+';
            if (a < 0) {
                a = -a;
                b = '-';
            }
            return b + leftZeroFill(toInt(a / 60), 2) + leftZeroFill(toInt(a) % 60, 2);
        },
        z : function () {
            return this.zoneAbbr();
        },
        zz : function () {
            return this.zoneName();
        },
        x    : function () {
            return this.valueOf();
        },
        X    : function () {
            return this.unix();
        },
        Q : function () {
            return this.quarter();
        }
    },

    deprecations = {},

    lists = ['months', 'monthsShort', 'weekdays', 'weekdaysShort', 'weekdaysMin'],

    updateInProgress = false;

// Pick the first defined of two or three arguments. dfl comes from
// default.
function dfl(a, b, c) {
    switch (arguments.length) {
        case 2: return a != null ? a : b;
        case 3: return a != null ? a : b != null ? b : c;
        default: throw new Error('Implement me');
    }
}

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

function defaultParsingFlags() {
    // We need to deep clone this object, and es5 standard is not very
    // helpful.
    return {
        empty : false,
        unusedTokens : [],
        unusedInput : [],
        overflow : -2,
        charsLeftOver : 0,
        nullInput : false,
        invalidMonth : null,
        invalidFormat : false,
        userInvalidated : false,
        iso: false
    };
}

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

function deprecate(msg, fn) {
    var firstTime = true;
    return extend(function () {
        if (firstTime) {
            printMsg(msg);
            firstTime = false;
        }
        return fn.apply(this, arguments);
    }, fn);
}

function deprecateSimple(name, msg) {
    if (!deprecations[name]) {
        printMsg(msg);
        deprecations[name] = true;
    }
}

function padToken(func, count) {
    return function (a) {
        return leftZeroFill(func.call(this, a), count);
    };
}
function ordinalizeToken(func, period) {
    return function (a) {
        return this.localeData().ordinal(func.call(this, a), period);
    };
}

function monthDiff(a, b) {
    // 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);
    }

    return -(wholeMonthDiff + adjust);
}

while (ordinalizeTokens.length) {
    i = ordinalizeTokens.pop();
    formatTokenFunctions[i + 'o'] = ordinalizeToken(formatTokenFunctions[i], i);
}
while (paddedTokens.length) {
    i = paddedTokens.pop();
    formatTokenFunctions[i + i] = padToken(formatTokenFunctions[i], 2);
}
formatTokenFunctions.DDDD = padToken(formatTokenFunctions.DDD, 3);

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 {
        // thie is not supposed to happen
        return hour;
    }
}

/************************************
    Constructors
************************************/

function Locale() {
}

// Moment prototype object
function Moment(config, skipOverflow) {
    if (skipOverflow !== false) {
        checkOverflow(config);
    }
    copyConfig(this, config);
    this._d = new Date(+config._d);
    // Prevent infinite loop in case updateOffset creates new moment
    // objects.
    if (updateInProgress === false) {
        updateInProgress = true;
        moment.updateOffset(this);
        updateInProgress = false;
    }
}

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

    // representation for dateAddRemove
    this._milliseconds = +milliseconds +
        seconds * 1e3 + // 1000
        minutes * 6e4 + // 1000 * 60
        hours * 36e5; // 1000 * 60 * 60
    // 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 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 = moment.localeData();

    this._bubble();
}

/************************************
    Helpers
************************************/

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

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

    if (momentProperties.length > 0) {
        for (i in momentProperties) {
            prop = momentProperties[i];
            val = from[prop];
            if (typeof val !== 'undefined') {
                to[prop] = val;
            }
        }
    }

    return to;
}

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

// left zero fill a number
// see http://jsperf.com/left-zero-filling for performance comparison
function leftZeroFill(number, targetLength, forceSign) {
    var output = '' + Math.abs(number),
        sign = number >= 0;

    while (output.length < targetLength) {
        output = '0' + output;
    }
    return (sign ? (forceSign ? '+' : '') : '-') + output;
}

function positiveMomentsDifference(base, other) {
    var res = {milliseconds: 0, months: 0};

    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;
    other = makeAs(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).');
            tmp = val; val = period; period = tmp;
        }

        val = typeof val === 'string' ? +val : val;
        dur = moment.duration(val, period);
        addOrSubtractDurationFromMoment(this, dur, direction);
        return this;
    };
}

function addOrSubtractDurationFromMoment(mom, duration, isAdding, updateOffset) {
    var milliseconds = duration._milliseconds,
        days = duration._days,
        months = duration._months;
    updateOffset = updateOffset == null ? true : updateOffset;

    if (milliseconds) {
        mom._d.setTime(+mom._d + milliseconds * isAdding);
    }
    if (days) {
        rawSetter(mom, 'Date', rawGetter(mom, 'Date') + days * isAdding);
    }
    if (months) {
        rawMonthSetter(mom, rawGetter(mom, 'Month') + months * isAdding);
    }
    if (updateOffset) {
        moment.updateOffset(mom, days || months);
    }
}

// check if is an array
function isArray(input) {
    return Object.prototype.toString.call(input) === '[object Array]';
}

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

// 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;
}

function normalizeUnits(units) {
    if (units) {
        var lowered = units.toLowerCase().replace(/(.)s$/, '$1');
        units = unitAliases[units] || camelFunctions[lowered] || lowered;
    }
    return units;
}

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;
}

function makeList(field) {
    var count, setter;

    if (field.indexOf('week') === 0) {
        count = 7;
        setter = 'day';
    }
    else if (field.indexOf('month') === 0) {
        count = 12;
        setter = 'month';
    }
    else {
        return;
    }

    moment[field] = function (format, index) {
        var i, getter,
            method = moment._locale[field],
            results = [];

        if (typeof format === 'number') {
            index = format;
            format = undefined;
        }

        getter = function (i) {
            var m = moment().utc().set(setter, i);
            return method.call(moment._locale, m, format || '');
        };

        if (index != null) {
            return getter(index);
        }
        else {
            for (i = 0; i < count; i++) {
                results.push(getter(i));
            }
            return results;
        }
    };
}

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

    if (coercedNumber !== 0 && isFinite(coercedNumber)) {
        if (coercedNumber >= 0) {
            value = Math.floor(coercedNumber);
        } else {
            value = Math.ceil(coercedNumber);
        }
    }

    return value;
}

function daysInMonth(year, month) {
    return new Date(Date.UTC(year, month + 1, 0)).getUTCDate();
}

function weeksInYear(year, dow, doy) {
    return weekOfYear(moment([year, 11, 31 + dow - doy]), dow, doy).week;
}

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

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

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

        if (m._pf._overflowDayOfYear && (overflow < YEAR || overflow > DATE)) {
            overflow = DATE;
        }

        m._pf.overflow = overflow;
    }
}

function isValid(m) {
    if (m._isValid == null) {
        m._isValid = !isNaN(m._d.getTime()) &&
            m._pf.overflow < 0 &&
            !m._pf.empty &&
            !m._pf.invalidMonth &&
            !m._pf.nullInput &&
            !m._pf.invalidFormat &&
            !m._pf.userInvalidated;

        if (m._strict) {
            m._isValid = m._isValid &&
                m._pf.charsLeftOver === 0 &&
                m._pf.unusedTokens.length === 0 &&
                m._pf.bigHour === undefined;
        }
    }
    return m._isValid;
}

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 && compareArrays(split, next, true) >= j - 1) {
                //the next array item is better than a shallower substring of this one
                break;
            }
            j--;
        }
        i++;
    }
    return null;
}

function loadLocale(name) {
    var oldLocale = null;
    if (!locales[name] && hasModule) {
        try {
            oldLocale = moment.locale();
            require('./locale/' + name);
            // because defineLocale currently also sets the global locale, we want to undo that for lazy loaded locales
            moment.locale(oldLocale);
        } catch (e) { }
    }
    return locales[name];
}

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

/************************************
    Locale
************************************/

extend(Locale.prototype, {

    set : function (config) {
        var prop, i;
        for (i in config) {
            prop = config[i];
            if (typeof prop === 'function') {
                this[i] = prop;
            } else {
                this['_' + i] = prop;
            }
        }
        // Lenient ordinal parsing accepts just a number in addition to
        // number + (possibly) stuff coming from _ordinalParseLenient.
        this._ordinalParseLenient = new RegExp(this._ordinalParse.source + '|' + /\d{1,2}/.source);
    },

    _months : 'January_February_March_April_May_June_July_August_September_October_November_December'.split('_'),
    months : function (m) {
        return this._months[m.month()];
    },

    _monthsShort : 'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split('_'),
    monthsShort : function (m) {
        return this._monthsShort[m.month()];
    },

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

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

        for (i = 0; i < 12; i++) {
            // make the regex if we don't have it already
            mom = moment.utc([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;
            }
        }
    },

    _weekdays : 'Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday'.split('_'),
    weekdays : function (m) {
        return this._weekdays[m.day()];
    },

    _weekdaysShort : 'Sun_Mon_Tue_Wed_Thu_Fri_Sat'.split('_'),
    weekdaysShort : function (m) {
        return this._weekdaysShort[m.day()];
    },

    _weekdaysMin : 'Su_Mo_Tu_We_Th_Fr_Sa'.split('_'),
    weekdaysMin : function (m) {
        return this._weekdaysMin[m.day()];
    },

    weekdaysParse : function (weekdayName) {
        var i, mom, regex;

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

        for (i = 0; i < 7; i++) {
            // make the regex if we don't have it already
            if (!this._weekdaysParse[i]) {
                mom = moment([2000, 1]).day(i);
                regex = '^' + this.weekdays(mom, '') + '|^' + this.weekdaysShort(mom, '') + '|^' + this.weekdaysMin(mom, '');
                this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
            }
            // test the regex
            if (this._weekdaysParse[i].test(weekdayName)) {
                return i;
            }
        }
    },

    _longDateFormat : {
        LTS : 'h:mm:ss A',
        LT : 'h:mm A',
        L : 'MM/DD/YYYY',
        LL : 'MMMM D, YYYY',
        LLL : 'MMMM D, YYYY LT',
        LLLL : 'dddd, MMMM D, YYYY LT'
    },
    longDateFormat : function (key) {
        var output = this._longDateFormat[key];
        if (!output && this._longDateFormat[key.toUpperCase()]) {
            output = this._longDateFormat[key.toUpperCase()].replace(/MMMM|MM|DD|dddd/g, function (val) {
                return val.slice(1);
            });
            this._longDateFormat[key] = output;
        }
        return output;
    },

    isPM : function (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');
    },

    _meridiemParse : /[ap]\.?m?\.?/i,
    meridiem : function (hours, minutes, isLower) {
        if (hours > 11) {
            return isLower ? 'pm' : 'PM';
        } else {
            return isLower ? 'am' : 'AM';
        }
    },

    _calendar : {
        sameDay : '[Today at] LT',
        nextDay : '[Tomorrow at] LT',
        nextWeek : 'dddd [at] LT',
        lastDay : '[Yesterday at] LT',
        lastWeek : '[Last] dddd [at] LT',
        sameElse : 'L'
    },
    calendar : function (key, mom, now) {
        var output = this._calendar[key];
        return typeof output === 'function' ? output.apply(mom, [now]) : output;
    },

    _relativeTime : {
        future : 'in %s',
        past : '%s ago',
        s : 'a few seconds',
        m : 'a minute',
        mm : '%d minutes',
        h : 'an hour',
        hh : '%d hours',
        d : 'a day',
        dd : '%d days',
        M : 'a month',
        MM : '%d months',
        y : 'a year',
        yy : '%d years'
    },

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

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

    ordinal : function (number) {
        return this._ordinal.replace('%d', number);
    },
    _ordinal : '%d',
    _ordinalParse : /\d{1,2}/,

    preparse : function (string) {
        return string;
    },

    postformat : function (string) {
        return string;
    },

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

    _week : {
        dow : 0, // Sunday is the first day of the week.
        doy : 6  // The week that contains Jan 1st is the first week of the year.
    },

    firstDayOfWeek : function () {
        return this._week.dow;
    },

    firstDayOfYear : function () {
        return this._week.doy;
    },

    _invalidDate: 'Invalid date',
    invalidDate: function () {
        return this._invalidDate;
    }
});

/************************************
    Formatting
************************************/

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 = '';
        for (i = 0; i < length; i++) {
            output += array[i] instanceof Function ? 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());

    if (!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;
}

/************************************
    Parsing
************************************/

// get the regex to find the next token
function getParseRegexForToken(token, config) {
    var a, strict = config._strict;
    switch (token) {
    case 'Q':
        return parseTokenOneDigit;
    case 'DDDD':
        return parseTokenThreeDigits;
    case 'YYYY':
    case 'GGGG':
    case 'gggg':
        return strict ? parseTokenFourDigits : parseTokenOneToFourDigits;
    case 'Y':
    case 'G':
    case 'g':
        return parseTokenSignedNumber;
    case 'YYYYYY':
    case 'YYYYY':
    case 'GGGGG':
    case 'ggggg':
        return strict ? parseTokenSixDigits : parseTokenOneToSixDigits;
    case 'S':
        if (strict) {
            return parseTokenOneDigit;
        }
        /* falls through */
    case 'SS':
        if (strict) {
            return parseTokenTwoDigits;
        }
        /* falls through */
    case 'SSS':
        if (strict) {
            return parseTokenThreeDigits;
        }
        /* falls through */
    case 'DDD':
        return parseTokenOneToThreeDigits;
    case 'MMM':
    case 'MMMM':
    case 'dd':
    case 'ddd':
    case 'dddd':
        return parseTokenWord;
    case 'a':
    case 'A':
        return config._locale._meridiemParse;
    case 'x':
        return parseTokenOffsetMs;
    case 'X':
        return parseTokenTimestampMs;
    case 'Z':
    case 'ZZ':
        return parseTokenTimezone;
    case 'T':
        return parseTokenT;
    case 'SSSS':
        return parseTokenDigits;
    case 'MM':
    case 'DD':
    case 'YY':
    case 'GG':
    case 'gg':
    case 'HH':
    case 'hh':
    case 'mm':
    case 'ss':
    case 'ww':
    case 'WW':
        return strict ? parseTokenTwoDigits : parseTokenOneOrTwoDigits;
    case 'M':
    case 'D':
    case 'd':
    case 'H':
    case 'h':
    case 'm':
    case 's':
    case 'w':
    case 'W':
    case 'e':
    case 'E':
        return parseTokenOneOrTwoDigits;
    case 'Do':
        return strict ? config._locale._ordinalParse : config._locale._ordinalParseLenient;
    default :
        a = new RegExp(regexpEscape(unescapeFormat(token.replace('\\', '')), 'i'));
        return a;
    }
}

function utcOffsetFromString(string) {
    string = string || '';
    var possibleTzMatches = (string.match(parseTokenTimezone) || []),
        tzChunk = possibleTzMatches[possibleTzMatches.length - 1] || [],
        parts = (tzChunk + '').match(parseTimezoneChunker) || ['-', 0, 0],
        minutes = +(parts[1] * 60) + toInt(parts[2]);

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

// function to convert string input to date
function addTimeToArrayFromToken(token, input, config) {
    var a, datePartArray = config._a;

    switch (token) {
    // QUARTER
    case 'Q':
        if (input != null) {
            datePartArray[MONTH] = (toInt(input) - 1) * 3;
        }
        break;
    // MONTH
    case 'M' : // fall through to MM
    case 'MM' :
        if (input != null) {
            datePartArray[MONTH] = toInt(input) - 1;
        }
        break;
    case 'MMM' : // fall through to MMMM
    case 'MMMM' :
        a = config._locale.monthsParse(input, token, config._strict);
        // if we didn't find a month name, mark the date as invalid.
        if (a != null) {
            datePartArray[MONTH] = a;
        } else {
            config._pf.invalidMonth = input;
        }
        break;
    // DAY OF MONTH
    case 'D' : // fall through to DD
    case 'DD' :
        if (input != null) {
            datePartArray[DATE] = toInt(input);
        }
        break;
    case 'Do' :
        if (input != null) {
            datePartArray[DATE] = toInt(parseInt(
                        input.match(/\d{1,2}/)[0], 10));
        }
        break;
    // DAY OF YEAR
    case 'DDD' : // fall through to DDDD
    case 'DDDD' :
        if (input != null) {
            config._dayOfYear = toInt(input);
        }

        break;
    // YEAR
    case 'YY' :
        datePartArray[YEAR] = moment.parseTwoDigitYear(input);
        break;
    case 'YYYY' :
    case 'YYYYY' :
    case 'YYYYYY' :
        datePartArray[YEAR] = toInt(input);
        break;
    // AM / PM
    case 'a' : // fall through to A
    case 'A' :
        config._meridiem = input;
        // config._isPm = config._locale.isPM(input);
        break;
    // HOUR
    case 'h' : // fall through to hh
    case 'hh' :
        config._pf.bigHour = true;
        /* falls through */
    case 'H' : // fall through to HH
    case 'HH' :
        datePartArray[HOUR] = toInt(input);
        break;
    // MINUTE
    case 'm' : // fall through to mm
    case 'mm' :
        datePartArray[MINUTE] = toInt(input);
        break;
    // SECOND
    case 's' : // fall through to ss
    case 'ss' :
        datePartArray[SECOND] = toInt(input);
        break;
    // MILLISECOND
    case 'S' :
    case 'SS' :
    case 'SSS' :
    case 'SSSS' :
        datePartArray[MILLISECOND] = toInt(('0.' + input) * 1000);
        break;
    // UNIX OFFSET (MILLISECONDS)
    case 'x':
        config._d = new Date(toInt(input));
        break;
    // UNIX TIMESTAMP WITH MS
    case 'X':
        config._d = new Date(parseFloat(input) * 1000);
        break;
    // TIMEZONE
    case 'Z' : // fall through to ZZ
    case 'ZZ' :
        config._useUTC = true;
        config._tzm = utcOffsetFromString(input);
        break;
    // WEEKDAY - human
    case 'dd':
    case 'ddd':
    case 'dddd':
        a = config._locale.weekdaysParse(input);
        // if we didn't get a weekday name, mark the date as invalid
        if (a != null) {
            config._w = config._w || {};
            config._w['d'] = a;
        } else {
            config._pf.invalidWeekday = input;
        }
        break;
    // WEEK, WEEK DAY - numeric
    case 'w':
    case 'ww':
    case 'W':
    case 'WW':
    case 'd':
    case 'e':
    case 'E':
        token = token.substr(0, 1);
        /* falls through */
    case 'gggg':
    case 'GGGG':
    case 'GGGGG':
        token = token.substr(0, 2);
        if (input) {
            config._w = config._w || {};
            config._w[token] = toInt(input);
        }
        break;
    case 'gg':
    case 'GG':
        config._w = config._w || {};
        config._w[token] = moment.parseTwoDigitYear(input);
    }
}

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

    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 = dfl(w.GG, config._a[YEAR], weekOfYear(moment(), 1, 4).year);
        week = dfl(w.W, 1);
        weekday = dfl(w.E, 1);
    } else {
        dow = config._locale._week.dow;
        doy = config._locale._week.doy;

        weekYear = dfl(w.gg, config._a[YEAR], weekOfYear(moment(), dow, doy).year);
        week = dfl(w.w, 1);

        if (w.d != null) {
            // weekday -- low day numbers are considered next week
            weekday = w.d;
            if (weekday < dow) {
                ++week;
            }
        } else if (w.e != null) {
            // local weekday -- counting starts from begining of week
            weekday = w.e + dow;
        } else {
            // default to begining of week
            weekday = dow;
        }
    }
    temp = dayOfYearFromWeeks(weekYear, week, weekday, doy, dow);

    config._a[YEAR] = temp.year;
    config._dayOfYear = temp.dayOfYear;
}

// 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 dateFromConfig(config) {
    var i, date, input = [], currentDate, 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) {
        yearToUse = dfl(config._a[YEAR], currentDate[YEAR]);

        if (config._dayOfYear > daysInYear(yearToUse)) {
            config._pf._overflowDayOfYear = true;
        }

        date = makeUTCDate(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 ? makeUTCDate : makeDate).apply(null, input);
    // 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;
    }
}

function dateFromObject(config) {
    var normalizedInput;

    if (config._d) {
        return;
    }

    normalizedInput = normalizeObjectUnits(config._i);
    config._a = [
        normalizedInput.year,
        normalizedInput.month,
        normalizedInput.day || normalizedInput.date,
        normalizedInput.hour,
        normalizedInput.minute,
        normalizedInput.second,
        normalizedInput.millisecond
    ];

    dateFromConfig(config);
}

function currentDateArray(config) {
    var now = new Date();
    if (config._useUTC) {
        return [
            now.getUTCFullYear(),
            now.getUTCMonth(),
            now.getUTCDate()
        ];
    } else {
        return [now.getFullYear(), now.getMonth(), now.getDate()];
    }
}

// date from string and format string
function makeDateFromStringAndFormat(config) {
    if (config._f === moment.ISO_8601) {
        parseISO(config);
        return;
    }

    config._a = [];
    config._pf.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;

    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) {
                config._pf.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) {
                config._pf.empty = false;
            }
            else {
                config._pf.unusedTokens.push(token);
            }
            addTimeToArrayFromToken(token, parsedInput, config);
        }
        else if (config._strict && !parsedInput) {
            config._pf.unusedTokens.push(token);
        }
    }

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

    // clear _12h flag if hour is <= 12
    if (config._pf.bigHour === true && config._a[HOUR] <= 12) {
        config._pf.bigHour = undefined;
    }
    // handle meridiem
    config._a[HOUR] = meridiemFixWrap(config._locale, config._a[HOUR],
            config._meridiem);
    dateFromConfig(config);
    checkOverflow(config);
}

function unescapeFormat(s) {
    return s.replace(/\\(\[)|\\(\])|\[([^\]\[]*)\]|\\(.)/g, function (matched, p1, p2, p3, p4) {
        return p1 || p2 || p3 || p4;
    });
}

// Code from http://stackoverflow.com/questions/3561493/is-there-a-regexp-escape-function-in-javascript
function regexpEscape(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}

// date from string and array of format strings
function makeDateFromStringAndArray(config) {
    var tempConfig,
        bestMoment,

        scoreToBeat,
        i,
        currentScore;

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

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

        if (!isValid(tempConfig)) {
            continue;
        }

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

        //or tokens
        currentScore += tempConfig._pf.unusedTokens.length * 10;

        tempConfig._pf.score = currentScore;

        if (scoreToBeat == null || currentScore < scoreToBeat) {
            scoreToBeat = currentScore;
            bestMoment = tempConfig;
        }
    }

    extend(config, bestMoment || tempConfig);
}

// date from iso format
function parseISO(config) {
    var i, l,
        string = config._i,
        match = isoRegex.exec(string);

    if (match) {
        config._pf.iso = true;
        for (i = 0, l = isoDates.length; i < l; i++) {
            if (isoDates[i][1].exec(string)) {
                // match[5] should be 'T' or undefined
                config._f = isoDates[i][0] + (match[6] || ' ');
                break;
            }
        }
        for (i = 0, l = isoTimes.length; i < l; i++) {
            if (isoTimes[i][1].exec(string)) {
                config._f += isoTimes[i][0];
                break;
            }
        }
        if (string.match(parseTokenTimezone)) {
            config._f += 'Z';
        }
        makeDateFromStringAndFormat(config);
    } else {
        config._isValid = false;
    }
}

// date from iso format or fallback
function makeDateFromString(config) {
    parseISO(config);
    if (config._isValid === false) {
        delete config._isValid;
        moment.createFromInputFallback(config);
    }
}

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

function makeDateFromInput(config) {
    var input = config._i, matched;
    if (input === undefined) {
        config._d = new Date();
    } else if (isDate(input)) {
        config._d = new Date(+input);
    } else if ((matched = aspNetJsonRegex.exec(input)) !== null) {
        config._d = new Date(+matched[1]);
    } else if (typeof input === 'string') {
        makeDateFromString(config);
    } else if (isArray(input)) {
        config._a = map(input.slice(0), function (obj) {
            return parseInt(obj, 10);
        });
        dateFromConfig(config);
    } else if (typeof(input) === 'object') {
        dateFromObject(config);
    } else if (typeof(input) === 'number') {
        // from milliseconds
        config._d = new Date(input);
    } else {
        moment.createFromInputFallback(config);
    }
}

function makeDate(y, m, d, h, M, s, ms) {
    //can't just apply() to create a date:
    //http://stackoverflow.com/questions/181348/instantiating-a-javascript-object-by-calling-prototype-constructor-apply
    var date = new Date(y, m, d, h, M, s, ms);

    //the date constructor doesn't accept years < 1970
    if (y < 1970) {
        date.setFullYear(y);
    }
    return date;
}

function makeUTCDate(y) {
    var date = new Date(Date.UTC.apply(null, arguments));
    if (y < 1970) {
        date.setUTCFullYear(y);
    }
    return date;
}

function parseWeekday(input, locale) {
    if (typeof input === 'string') {
        if (!isNaN(input)) {
            input = parseInt(input, 10);
        }
        else {
            input = locale.weekdaysParse(input);
            if (typeof input !== 'number') {
                return null;
            }
        }
    }
    return input;
}

/************************************
    Relative Time
************************************/

// 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(posNegDuration, withoutSuffix, locale) {
    var duration = moment.duration(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')),
        years = round(duration.as('y')),

        args = seconds < relativeTimeThresholds.s && ['s', seconds] ||
            minutes === 1 && ['m'] ||
            minutes < relativeTimeThresholds.m && ['mm', minutes] ||
            hours === 1 && ['h'] ||
            hours < relativeTimeThresholds.h && ['hh', hours] ||
            days === 1 && ['d'] ||
            days < relativeTimeThresholds.d && ['dd', days] ||
            months === 1 && ['M'] ||
            months < relativeTimeThresholds.M && ['MM', months] ||
            years === 1 && ['y'] || ['yy', years];

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

/************************************
    Week of Year
************************************/

// firstDayOfWeek       0 = sun, 6 = sat
//                      the day of the week that starts the week
//                      (usually sunday or monday)
// firstDayOfWeekOfYear 0 = sun, 6 = sat
//                      the first week is the week that contains the first
//                      of this day of the week
//                      (eg. ISO weeks use thursday (4))
function weekOfYear(mom, firstDayOfWeek, firstDayOfWeekOfYear) {
    var end = firstDayOfWeekOfYear - firstDayOfWeek,
        daysToDayOfWeek = firstDayOfWeekOfYear - mom.day(),
        adjustedMoment;

    if (daysToDayOfWeek > end) {
        daysToDayOfWeek -= 7;
    }

    if (daysToDayOfWeek < end - 7) {
        daysToDayOfWeek += 7;
    }

    adjustedMoment = moment(mom).add(daysToDayOfWeek, 'd');
    return {
        week: Math.ceil(adjustedMoment.dayOfYear() / 7),
        year: adjustedMoment.year()
    };
}

//http://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
function dayOfYearFromWeeks(year, week, weekday, firstDayOfWeekOfYear, firstDayOfWeek) {
    var d = makeUTCDate(year, 0, 1).getUTCDay(), daysToAdd, dayOfYear;

    d = d === 0 ? 7 : d;
    weekday = weekday != null ? weekday : firstDayOfWeek;
    daysToAdd = firstDayOfWeek - d + (d > firstDayOfWeekOfYear ? 7 : 0) - (d < firstDayOfWeek ? 7 : 0);
    dayOfYear = 7 * (week - 1) + (weekday - firstDayOfWeek) + daysToAdd + 1;

    return {
        year: dayOfYear > 0 ? year : year - 1,
        dayOfYear: dayOfYear > 0 ?  dayOfYear : daysInYear(year - 1) + dayOfYear
    };
}

/************************************
    Top Level Functions
************************************/

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

    config._locale = config._locale || moment.localeData(config._l);

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

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

    if (moment.isMoment(input)) {
        return new Moment(input, true);
    } else if (format) {
        if (isArray(format)) {
            makeDateFromStringAndArray(config);
        } else {
            makeDateFromStringAndFormat(config);
        }
    } else {
        makeDateFromInput(config);
    }

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

    return res;
}

moment = function (input, format, locale, strict) {
    var c;

    if (typeof(locale) === 'boolean') {
        strict = locale;
        locale = undefined;
    }
    // object construction must be done this way.
    // https://github.com/moment/moment/issues/1423
    c = {};
    c._isAMomentObject = true;
    c._i = input;
    c._f = format;
    c._l = locale;
    c._strict = strict;
    c._isUTC = false;
    c._pf = defaultParsingFlags();

    return makeMoment(c);
};

moment.suppressDeprecationWarnings = false;

moment.createFromInputFallback = deprecate(
    'moment construction falls back to js Date. This is ' +
    'discouraged and will be removed in upcoming major ' +
    'release. Please refer to ' +
    'https://github.com/moment/moment/issues/1407 for more info.',
    function (config) {
        config._d = new Date(config._i + (config._useUTC ? ' UTC' : ''));
    }
);

// 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 moment();
    }
    res = moments[0];
    for (i = 1; i < moments.length; ++i) {
        if (moments[i][fn](res)) {
            res = moments[i];
        }
    }
    return res;
}

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

    return pickBy('isBefore', args);
};

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

    return pickBy('isAfter', args);
};

// creating with utc
moment.utc = function (input, format, locale, strict) {
    var c;

    if (typeof(locale) === 'boolean') {
        strict = locale;
        locale = undefined;
    }
    // object construction must be done this way.
    // https://github.com/moment/moment/issues/1423
    c = {};
    c._isAMomentObject = true;
    c._useUTC = true;
    c._isUTC = true;
    c._l = locale;
    c._i = input;
    c._f = format;
    c._strict = strict;
    c._pf = defaultParsingFlags();

    return makeMoment(c).utc();
};

// creating with unix timestamp (in seconds)
moment.unix = function (input) {
    return moment(input * 1000);
};

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

    if (moment.isDuration(input)) {
        duration = {
            ms: input._milliseconds,
            d: input._days,
            M: input._months
        };
    } else if (typeof input === 'number') {
        duration = {};
        if (key) {
            duration[key] = input;
        } else {
            duration.milliseconds = input;
        }
    } else if (!!(match = aspNetTimeSpanJsonRegex.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(match[MILLISECOND]) * sign
        };
    } else if (!!(match = isoDurationRegex.exec(input))) {
        sign = (match[1] === '-') ? -1 : 1;
        parseIso = function (inp) {
            // 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;
        };
        duration = {
            y: parseIso(match[2]),
            M: parseIso(match[3]),
            d: parseIso(match[4]),
            h: parseIso(match[5]),
            m: parseIso(match[6]),
            s: parseIso(match[7]),
            w: parseIso(match[8])
        };
    } else if (duration == null) {// checks for null or undefined
        duration = {};
    } else if (typeof duration === 'object' &&
            ('from' in duration || 'to' in duration)) {
        diffRes = momentsDifference(moment(duration.from), moment(duration.to));

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

    ret = new Duration(duration);

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

    return ret;
};

// version number
moment.version = VERSION;

// default format
moment.defaultFormat = isoFormat;

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

// Plugins that add properties should also add the key here (null value),
// so we can properly clone ourselves.
moment.momentProperties = momentProperties;

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

// This function allows you to set a threshold for relative time strings
moment.relativeTimeThreshold = function (threshold, limit) {
    if (relativeTimeThresholds[threshold] === undefined) {
        return false;
    }
    if (limit === undefined) {
        return relativeTimeThresholds[threshold];
    }
    relativeTimeThresholds[threshold] = limit;
    return true;
};

moment.lang = deprecate(
    'moment.lang is deprecated. Use moment.locale instead.',
    function (key, value) {
        return moment.locale(key, value);
    }
);

// 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.
moment.locale = function (key, values) {
    var data;
    if (key) {
        if (typeof(values) !== 'undefined') {
            data = moment.defineLocale(key, values);
        }
        else {
            data = moment.localeData(key);
        }

        if (data) {
            moment.duration._locale = moment._locale = data;
        }
    }

    return moment._locale._abbr;
};

moment.defineLocale = function (name, values) {
    if (values !== null) {
        values.abbr = name;
        if (!locales[name]) {
            locales[name] = new Locale();
        }
        locales[name].set(values);

        // backwards compat for now: also set the locale
        moment.locale(name);

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

moment.langData = deprecate(
    'moment.langData is deprecated. Use moment.localeData instead.',
    function (key) {
        return moment.localeData(key);
    }
);

// returns locale data
moment.localeData = function (key) {
    var locale;

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

    if (!key) {
        return moment._locale;
    }

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

    return chooseLocale(key);
};

// compare moment object
moment.isMoment = function (obj) {
    return obj instanceof Moment ||
        (obj != null && hasOwnProp(obj, '_isAMomentObject'));
};

// for typechecking Duration objects
moment.isDuration = function (obj) {
    return obj instanceof Duration;
};

for (i = lists.length - 1; i >= 0; --i) {
    makeList(lists[i]);
}

moment.normalizeUnits = function (units) {
    return normalizeUnits(units);
};

moment.invalid = function (flags) {
    var m = moment.utc(NaN);
    if (flags != null) {
        extend(m._pf, flags);
    }
    else {
        m._pf.userInvalidated = true;
    }

    return m;
};

moment.parseZone = function () {
    return moment.apply(null, arguments).parseZone();
};

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

moment.isDate = isDate;

/************************************
    Moment Prototype
************************************/

extend(moment.fn = Moment.prototype, {

    clone : function () {
        return moment(this);
    },

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

    unix : function () {
        return Math.floor(+this / 1000);
    },

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

    toDate : function () {
        return this._offset ? new Date(+this) : this._d;
    },

    toISOString : function () {
        var m = moment(this).utc();
        if (0 < m.year() && m.year() <= 9999) {
            if ('function' === typeof Date.prototype.toISOString) {
                // native implementation is ~50x faster, use it when we can
                return this.toDate().toISOString();
            } else {
                return formatMoment(m, 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
            }
        } else {
            return formatMoment(m, 'YYYYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
        }
    },

    toArray : function () {
        var m = this;
        return [
            m.year(),
            m.month(),
            m.date(),
            m.hours(),
            m.minutes(),
            m.seconds(),
            m.milliseconds()
        ];
    },

    isValid : function () {
        return isValid(this);
    },

    isDSTShifted : function () {
        if (this._a) {
            return this.isValid() && compareArrays(this._a, (this._isUTC ? moment.utc(this._a) : moment(this._a)).toArray()) > 0;
        }

        return false;
    },

    parsingFlags : function () {
        return extend({}, this._pf);
    },

    invalidAt: function () {
        return this._pf.overflow;
    },

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

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

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

    format : function (inputString) {
        var output = formatMoment(this, inputString || moment.defaultFormat);
        return this.localeData().postformat(output);
    },

    add : createAdder(1, 'add'),

    subtract : createAdder(-1, 'subtract'),

    diff : function (input, units, asFloat) {
        var that = makeAs(input, this),
            zoneDiff = (that.utcOffset() - this.utcOffset()) * 6e4,
            anchor, diff, output, daysAdjust;

        units = normalizeUnits(units);

        if (units === 'year' || units === 'month' || units === 'quarter') {
            output = monthDiff(this, that);
            if (units === 'quarter') {
                output = output / 3;
            } else if (units === 'year') {
                output = output / 12;
            }
        } else {
            diff = this - that;
            output = units === 'second' ? diff / 1e3 : // 1000
                units === 'minute' ? diff / 6e4 : // 1000 * 60
                units === 'hour' ? diff / 36e5 : // 1000 * 60 * 60
                units === 'day' ? (diff - zoneDiff) / 864e5 : // 1000 * 60 * 60 * 24, negate dst
                units === 'week' ? (diff - zoneDiff) / 6048e5 : // 1000 * 60 * 60 * 24 * 7, negate dst
                diff;
        }
        return asFloat ? output : absRound(output);
    },

    from : function (time, withoutSuffix) {
        return moment.duration({to: this, from: time}).locale(this.locale()).humanize(!withoutSuffix);
    },

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

    calendar : function (time) {
        // We want to compare the start of today, vs this.
        // Getting start-of-today depends on whether we're locat/utc/offset
        // or not.
        var now = time || moment(),
            sod = makeAs(now, this).startOf('day'),
            diff = this.diff(sod, 'days', true),
            format = diff < -6 ? 'sameElse' :
                diff < -1 ? 'lastWeek' :
                diff < 0 ? 'lastDay' :
                diff < 1 ? 'sameDay' :
                diff < 2 ? 'nextDay' :
                diff < 7 ? 'nextWeek' : 'sameElse';
        return this.format(this.localeData().calendar(format, this, moment(now)));
    },

    isLeapYear : function () {
        return isLeapYear(this.year());
    },

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

    day : function (input) {
        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;
        }
    },

    month : makeAccessor('Month', true),

    startOf : function (units) {
        units = normalizeUnits(units);
        // the following switch intentionally omits break keywords
        // to utilize falling through the cases.
        switch (units) {
        case 'year':
            this.month(0);
            /* falls through */
        case 'quarter':
        case 'month':
            this.date(1);
            /* falls through */
        case 'week':
        case 'isoWeek':
        case 'day':
            this.hours(0);
            /* falls through */
        case 'hour':
            this.minutes(0);
            /* falls through */
        case 'minute':
            this.seconds(0);
            /* falls through */
        case 'second':
            this.milliseconds(0);
            /* falls through */
        }

        // weeks are a special case
        if (units === 'week') {
            this.weekday(0);
        } else if (units === 'isoWeek') {
            this.isoWeekday(1);
        }

        // quarters are also special
        if (units === 'quarter') {
            this.month(Math.floor(this.month() / 3) * 3);
        }

        return this;
    },

    endOf: function (units) {
        units = normalizeUnits(units);
        if (units === undefined || units === 'millisecond') {
            return this;
        }
        return this.startOf(units).add(1, (units === 'isoWeek' ? 'week' : units)).subtract(1, 'ms');
    },

    isAfter: function (input, units) {
        var inputMs;
        units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
        if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this > +input;
        } else {
            inputMs = moment.isMoment(input) ? +input : +moment(input);
            return inputMs < +this.clone().startOf(units);
        }
    },

    isBefore: function (input, units) {
        var inputMs;
        units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
        if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this < +input;
        } else {
            inputMs = moment.isMoment(input) ? +input : +moment(input);
            return +this.clone().endOf(units) < inputMs;
        }
    },

    isBetween: function (from, to, units) {
        return this.isAfter(from, units) && this.isBefore(to, units);
    },

    isSame: function (input, units) {
        var inputMs;
        units = normalizeUnits(units || 'millisecond');
        if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this === +input;
        } else {
            inputMs = +moment(input);
            return +(this.clone().startOf(units)) <= inputMs && inputMs <= +(this.clone().endOf(units));
        }
    },

    min: deprecate(
             'moment().min is deprecated, use moment.min instead. https://github.com/moment/moment/issues/1548',
             function (other) {
                 other = moment.apply(null, arguments);
                 return other < this ? this : other;
             }
     ),

    max: deprecate(
            'moment().max is deprecated, use moment.max instead. https://github.com/moment/moment/issues/1548',
            function (other) {
                other = moment.apply(null, arguments);
                return other > this ? this : other;
            }
    ),

    zone : deprecate(
            'moment().zone is deprecated, use moment().utcOffset instead. ' +
            'https://github.com/moment/moment/issues/1779',
            function (input, keepLocalTime) {
                if (input != null) {
                    if (typeof input !== 'string') {
                        input = -input;
                    }

                    this.utcOffset(input, keepLocalTime);

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

    // 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.
    utcOffset : function (input, keepLocalTime) {
        var offset = this._offset || 0,
            localAdjust;
        if (input != null) {
            if (typeof input === 'string') {
                input = utcOffsetFromString(input);
            }
            if (Math.abs(input) < 16) {
                input = input * 60;
            }
            if (!this._isUTC && keepLocalTime) {
                localAdjust = this._dateUtcOffset();
            }
            this._offset = input;
            this._isUTC = true;
            if (localAdjust != null) {
                this.add(localAdjust, 'm');
            }
            if (offset !== input) {
                if (!keepLocalTime || this._changeInProgress) {
                    addOrSubtractDurationFromMoment(this,
                            moment.duration(input - offset, 'm'), 1, false);
                } else if (!this._changeInProgress) {
                    this._changeInProgress = true;
                    moment.updateOffset(this, true);
                    this._changeInProgress = null;
                }
            }

            return this;
        } else {
            return this._isUTC ? offset : this._dateUtcOffset();
        }
    },

    isLocal : function () {
        return !this._isUTC;
    },

    isUtcOffset : function () {
        return this._isUTC;
    },

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

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

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

    parseZone : function () {
        if (this._tzm) {
            this.utcOffset(this._tzm);
        } else if (typeof this._i === 'string') {
            this.utcOffset(utcOffsetFromString(this._i));
        }
        return this;
    },

    hasAlignedHourOffset : function (input) {
        if (!input) {
            input = 0;
        }
        else {
            input = moment(input).utcOffset();
        }

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

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

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

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

    weekYear : function (input) {
        var year = weekOfYear(this, this.localeData()._week.dow, this.localeData()._week.doy).year;
        return input == null ? year : this.add((input - year), 'y');
    },

    isoWeekYear : function (input) {
        var year = weekOfYear(this, 1, 4).year;
        return input == null ? year : this.add((input - year), 'y');
    },

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

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

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

    isoWeekday : function (input) {
        // 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.
        return input == null ? this.day() || 7 : this.day(this.day() % 7 ? input : input - 7);
    },

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

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

    get : function (units) {
        units = normalizeUnits(units);
        return this[units]();
    },

    set : function (units, value) {
        var unit;
        if (typeof units === 'object') {
            for (unit in units) {
                this.set(unit, units[unit]);
            }
        }
        else {
            units = normalizeUnits(units);
            if (typeof this[units] === 'function') {
                this[units](value);
            }
        }
        return this;
    },

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

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

    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);
            }
        }
    ),

    localeData : function () {
        return this._locale;
    },

    _dateUtcOffset : function () {
        // On Firefox.24 Date#getTimezoneOffset returns a floating point.
        // https://github.com/moment/moment/pull/1871
        return -Math.round(this._d.getTimezoneOffset() / 15) * 15;
    }

});

function rawMonthSetter(mom, value) {
    var dayOfMonth;

    // TODO: Move this out of here!
    if (typeof value === 'string') {
        value = mom.localeData().monthsParse(value);
        // TODO: Another silent failure?
        if (typeof value !== 'number') {
            return mom;
        }
    }

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

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

function rawSetter(mom, unit, value) {
    if (unit === 'Month') {
        return rawMonthSetter(mom, value);
    } else {
        return mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](value);
    }
}

function makeAccessor(unit, keepTime) {
    return function (value) {
        if (value != null) {
            rawSetter(this, unit, value);
            moment.updateOffset(this, keepTime);
            return this;
        } else {
            return rawGetter(this, unit);
        }
    };
}

moment.fn.millisecond = moment.fn.milliseconds = makeAccessor('Milliseconds', false);
moment.fn.second = moment.fn.seconds = makeAccessor('Seconds', false);
moment.fn.minute = moment.fn.minutes = makeAccessor('Minutes', false);
// Setting the hour should keep the time, because the user explicitly
// specified which hour he wants. So trying to maintain the same hour (in
// a new timezone) makes sense. Adding/subtracting hours does not follow
// this rule.
moment.fn.hour = moment.fn.hours = makeAccessor('Hours', true);
// moment.fn.month is defined separately
moment.fn.date = makeAccessor('Date', true);
moment.fn.dates = deprecate('dates accessor is deprecated. Use date instead.', makeAccessor('Date', true));
moment.fn.year = makeAccessor('FullYear', true);
moment.fn.years = deprecate('years accessor is deprecated. Use year instead.', makeAccessor('FullYear', true));

// add plural methods
moment.fn.days = moment.fn.day;
moment.fn.months = moment.fn.month;
moment.fn.weeks = moment.fn.week;
moment.fn.isoWeeks = moment.fn.isoWeek;
moment.fn.quarters = moment.fn.quarter;

// add aliased format methods
moment.fn.toJSON = moment.fn.toISOString;

// alias isUtc for dev-friendliness
moment.fn.isUTC = moment.fn.isUtc;

/************************************
    Duration Prototype
************************************/

function daysToYears (days) {
    // 400 years have 146097 days (taking into account leap year rules)
    return days * 400 / 146097;
}

function yearsToDays (years) {
    // years * 365 + absRound(years / 4) -
    //     absRound(years / 100) + absRound(years / 400);
    return years * 146097 / 400;
}

extend(moment.duration.fn = Duration.prototype, {

    _bubble : function () {
        var milliseconds = this._milliseconds,
            days = this._days,
            months = this._months,
            data = this._data,
            seconds, minutes, hours, years = 0;

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

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

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

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

        days += absRound(hours / 24);

        // Accurately convert days to years, assume start from year 0.
        years = absRound(daysToYears(days));
        days -= absRound(yearsToDays(years));

        // 30 days to a month
        // TODO (iskren): Use anchor date (like 1st Jan) to compute this.
        months += absRound(days / 30);
        days %= 30;

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

        data.days = days;
        data.months = months;
        data.years = years;
    },

    abs : function () {
        this._milliseconds = Math.abs(this._milliseconds);
        this._days = Math.abs(this._days);
        this._months = Math.abs(this._months);

        this._data.milliseconds = Math.abs(this._data.milliseconds);
        this._data.seconds = Math.abs(this._data.seconds);
        this._data.minutes = Math.abs(this._data.minutes);
        this._data.hours = Math.abs(this._data.hours);
        this._data.months = Math.abs(this._data.months);
        this._data.years = Math.abs(this._data.years);

        return this;
    },

    weeks : function () {
        return absRound(this.days() / 7);
    },

    valueOf : function () {
        return this._milliseconds +
          this._days * 864e5 +
          (this._months % 12) * 2592e6 +
          toInt(this._months / 12) * 31536e6;
    },

    humanize : function (withSuffix) {
        var output = relativeTime(this, !withSuffix, this.localeData());

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

        return this.localeData().postformat(output);
    },

    add : function (input, val) {
        // supports only 2.0-style add(1, 's') or add(moment)
        var dur = moment.duration(input, val);

        this._milliseconds += dur._milliseconds;
        this._days += dur._days;
        this._months += dur._months;

        this._bubble();

        return this;
    },

    subtract : function (input, val) {
        var dur = moment.duration(input, val);

        this._milliseconds -= dur._milliseconds;
        this._days -= dur._days;
        this._months -= dur._months;

        this._bubble();

        return this;
    },

    get : function (units) {
        units = normalizeUnits(units);
        return this[units.toLowerCase() + 's']();
    },

    as : function (units) {
        var days, months;
        units = normalizeUnits(units);

        if (units === 'month' || units === 'year') {
            days = this._days + this._milliseconds / 864e5;
            months = this._months + daysToYears(days) * 12;
            return units === 'month' ? months : months / 12;
        } else {
            // handle milliseconds separately because of floating point math errors (issue #1867)
            days = this._days + Math.round(yearsToDays(this._months / 12));
            switch (units) {
                case 'week': return days / 7 + this._milliseconds / 6048e5;
                case 'day': return days + this._milliseconds / 864e5;
                case 'hour': return days * 24 + this._milliseconds / 36e5;
                case 'minute': return days * 24 * 60 + this._milliseconds / 6e4;
                case 'second': return days * 24 * 60 * 60 + this._milliseconds / 1000;
                // Math.floor prevents floating point math errors here
                case 'millisecond': return Math.floor(days * 24 * 60 * 60 * 1000) + this._milliseconds;
                default: throw new Error('Unknown unit ' + units);
            }
        }
    },

    lang : moment.fn.lang,
    locale : moment.fn.locale,

    toIsoString : deprecate(
        'toIsoString() is deprecated. Please use toISOString() instead ' +
        '(notice the capitals)',
        function () {
            return this.toISOString();
        }
    ),

    toISOString : function () {
        // inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
        var years = Math.abs(this.years()),
            months = Math.abs(this.months()),
            days = Math.abs(this.days()),
            hours = Math.abs(this.hours()),
            minutes = Math.abs(this.minutes()),
            seconds = Math.abs(this.seconds() + this.milliseconds() / 1000);

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

        return (this.asSeconds() < 0 ? '-' : '') +
            'P' +
            (years ? years + 'Y' : '') +
            (months ? months + 'M' : '') +
            (days ? days + 'D' : '') +
            ((hours || minutes || seconds) ? 'T' : '') +
            (hours ? hours + 'H' : '') +
            (minutes ? minutes + 'M' : '') +
            (seconds ? seconds + 'S' : '');
    },

    localeData : function () {
        return this._locale;
    },

    toJSON : function () {
        return this.toISOString();
    }
});

moment.duration.fn.toString = moment.duration.fn.toISOString;

function makeDurationGetter(name) {
    moment.duration.fn[name] = function () {
        return this._data[name];
    };
}

for (i in unitMillisecondFactors) {
    if (hasOwnProp(unitMillisecondFactors, i)) {
        makeDurationGetter(i.toLowerCase());
    }
}

moment.duration.fn.asMilliseconds = function () {
    return this.as('ms');
};
moment.duration.fn.asSeconds = function () {
    return this.as('s');
};
moment.duration.fn.asMinutes = function () {
    return this.as('m');
};
moment.duration.fn.asHours = function () {
    return this.as('h');
};
moment.duration.fn.asDays = function () {
    return this.as('d');
};
moment.duration.fn.asWeeks = function () {
    return this.as('weeks');
};
moment.duration.fn.asMonths = function () {
    return this.as('M');
};
moment.duration.fn.asYears = function () {
    return this.as('y');
};

/************************************
    Default Locale
************************************/

// Set default locale, other locale will inherit from English.
moment.locale('en', {
    ordinalParse: /\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;
    }
});

/* EMBED_LOCALES */

/************************************
    Exposing Moment
************************************/

function makeGlobal(shouldDeprecate) {
    /*global ender:false */
    if (typeof ender !== 'undefined') {
        return;
    }
    oldGlobalMoment = globalScope.moment;
    if (shouldDeprecate) {
        globalScope.moment = deprecate(
                'Accessing Moment through the global scope is ' +
                'deprecated, and will be removed in an upcoming ' +
                'release.',
                moment);
    } else {
        globalScope.moment = moment;
    }
}

// CommonJS module is defined
if (hasModule) {
    module.exports = moment;
} else if (typeof define === 'function' && define.amd) {
    define(function (require, exports, module) {
        if (module.config && module.config() && module.config().noGlobal === true) {
            // release the global variable
            globalScope.moment = oldGlobalMoment;
        }

        return moment;
    });
    makeGlobal(true);
} else {
    makeGlobal();
}

}).call(this);