text: //! moment.js
  //! version : 2.8.4
  //! authors : Tim Wood, Iskren Chernev, Moment.js contributors
  //! license : MIT
  //! momentjs.com
  
  (function (undefined) {
    /************************************
     Constants
     ************************************/
  
    var moment,
      VERSION = '2.8.4',
    // the global-scope this is NOT the global object in Node.js
      globalScope = typeof global !== 'undefined' ? 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.zone(),
            b = '+';
          if (a < 0) {
            a = -a;
            b = '-';
          }
          return b + leftZeroFill(toInt(a / 60), 2) + ':' + leftZeroFill(toInt(a) % 60, 2);
        },
        ZZ   : function () {
          var a = -this.zone(),
            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'];
  
    // 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);
      };
    }
  
    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);
  
  
    /************************************
     Constructors
     ************************************/
  
    function Locale() {
    }
  
    // Moment prototype object
    function Moment(config, skipOverflow) {
      if (skipOverflow !== false) {
        checkOverflow(config);
      }
      copyConfig(this, config);
      this._d = new Date(+config._d);
    }
  
    // 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/zone 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.
      },
  
      _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 timezoneMinutesFromString(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._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 = timezoneMinutesFromString(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 zone 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 am pm
      if (config._isPm && config._a[HOUR] < 12) {
        config._a[HOUR] += 12;
      }
      // if is 12 am, change hours to 0
      if (config._isPm === false && config._a[HOUR] === 12) {
        config._a[HOUR] = 0;
      }
      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 (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 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.zone(0, keepLocalTime);
      },
  
      local : function (keepLocalTime) {
        if (this._isUTC) {
          this.zone(0, keepLocalTime);
          this._isUTC = false;
  
          if (keepLocalTime) {
            this.add(this._dateTzOffset(), '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 = (this.zone() - that.zone()) * 6e4,
          diff, output, daysAdjust;
  
        units = normalizeUnits(units);
  
        if (units === 'year' || units === 'month') {
          // average number of days in the months in the given dates
          diff = (this.daysInMonth() + that.daysInMonth()) * 432e5; // 24 * 60 * 60 * 1000 / 2
          // difference in months
          output = ((this.year() - that.year()) * 12) + (this.month() - that.month());
          // adjust by taking difference in days, average number of days
          // and dst in the given months.
          daysAdjust = (this - moment(this).startOf('month')) -
          (that - moment(that).startOf('month'));
          // same as above but with zones, to negate all dst
          daysAdjust -= ((this.zone() - moment(this).startOf('month').zone()) -
          (that.zone() - moment(that).startOf('month').zone())) * 6e4;
          output += daysAdjust / diff;
          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 zone'd 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.zone() < this.clone().month(0).zone() ||
        this.zone() < this.clone().month(5).zone());
      },
  
      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;
        }
      },
  
      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;
        }
      ),
  
      // keepLocalTime = true means only change the timezone, without
      // affecting the local hour. So 5:31:26 +0300 --[zone(2, true)]-->
      // 5:31:26 +0200 It is possible that 5:31:26 doesn't exist int zone
      // +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.
      zone : function (input, keepLocalTime) {
        var offset = this._offset || 0,
          localAdjust;
        if (input != null) {
          if (typeof input === 'string') {
            input = timezoneMinutesFromString(input);
          }
          if (Math.abs(input) < 16) {
            input = input * 60;
          }
          if (!this._isUTC && keepLocalTime) {
            localAdjust = this._dateTzOffset();
          }
          this._offset = input;
          this._isUTC = true;
          if (localAdjust != null) {
            this.subtract(localAdjust, 'm');
          }
          if (offset !== input) {
            if (!keepLocalTime || this._changeInProgress) {
              addOrSubtractDurationFromMoment(this,
                moment.duration(offset - input, 'm'), 1, false);
            } else if (!this._changeInProgress) {
              this._changeInProgress = true;
              moment.updateOffset(this, true);
              this._changeInProgress = null;
            }
          }
        } else {
          return this._isUTC ? offset : this._dateTzOffset();
        }
        return this;
      },
  
      zoneAbbr : function () {
        return this._isUTC ? 'UTC' : '';
      },
  
      zoneName : function () {
        return this._isUTC ? 'Coordinated Universal Time' : '';
      },
  
      parseZone : function () {
        if (this._tzm) {
          this.zone(this._tzm);
        } else if (typeof this._i === 'string') {
          this.zone(this._i);
        }
        return this;
      },
  
      hasAlignedHourOffset : function (input) {
        if (!input) {
          input = 0;
        }
        else {
          input = moment(input).zone();
        }
  
        return (this.zone() - 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) {
        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;
      },
  
      _dateTzOffset : 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;
  
    /************************************
     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;
      }
    });
  
    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('moment', 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);