//! 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);