text: /**
   * This script gives you the zone info key representing your device's time zone setting.
   *
   * @name jsTimezoneDetect
   * @version 1.0.5
   * @author Jon Nylander
   * @license MIT License - http://www.opensource.org/licenses/mit-license.php
   *
   * For usage and examples, visit:
   * http://pellepim.bitbucket.org/jstz/
   *
   * Copyright (c) Jon Nylander
   */
  
  /*jslint undef: true */
  /*global console, exports*/
  
  (function(root) {
    /**
     * Namespace to hold all the code for timezone detection.
     */
    var jstz = (function () {
        'use strict';
        var HEMISPHERE_SOUTH = 's',
            
            /**
             * Gets the offset in minutes from UTC for a certain date.
             * @param {Date} date
             * @returns {Number}
             */
            get_date_offset = function (date) {
                var offset = -date.getTimezoneOffset();
                return (offset !== null ? offset : 0);
            },
  
            get_date = function (year, month, date) {
                var d = new Date();
                if (year !== undefined) {
                  d.setFullYear(year);
                }
                d.setMonth(month);
                d.setDate(date);
                return d;
            },
  
            get_january_offset = function (year) {
                return get_date_offset(get_date(year, 0 ,2));
            },
  
            get_june_offset = function (year) {
                return get_date_offset(get_date(year, 5, 2));
            },
  
            /**
             * Private method.
             * Checks whether a given date is in daylight saving time.
             * If the date supplied is after august, we assume that we're checking
             * for southern hemisphere DST.
             * @param {Date} date
             * @returns {Boolean}
             */
            date_is_dst = function (date) {
                var is_southern = date.getMonth() > 7,
                    base_offset = is_southern ? get_june_offset(date.getFullYear()) : 
                                                get_january_offset(date.getFullYear()),
                    date_offset = get_date_offset(date),
                    is_west = base_offset < 0,
                    dst_offset = base_offset - date_offset;
                    
                if (!is_west && !is_southern) {
                    return dst_offset < 0;
                }
  
                return dst_offset !== 0;
            },
  
            /**
             * This function does some basic calculations to create information about
             * the user's timezone. It uses REFERENCE_YEAR as a solid year for which
             * the script has been tested rather than depend on the year set by the
             * client device.
             *
             * Returns a key that can be used to do lookups in jstz.olson.timezones.
             * eg: "720,1,2". 
             *
             * @returns {String}
             */
  
            lookup_key = function () {
                var january_offset = get_january_offset(),
                    june_offset = get_june_offset(),
                    diff = january_offset - june_offset;
  
                if (diff < 0) {
                    return january_offset + ",1";
                } else if (diff > 0) {
                    return june_offset + ",1," + HEMISPHERE_SOUTH;
                }
  
                return january_offset + ",0";
            },
  
            /**
             * Uses get_timezone_info() to formulate a key to use in the olson.timezones dictionary.
             *
             * Returns a primitive object on the format:
             * {'timezone': TimeZone, 'key' : 'the key used to find the TimeZone object'}
             *
             * @returns Object
             */
            determine = function () {
                var key = lookup_key();
                return new jstz.TimeZone(jstz.olson.timezones[key]);
            },
  
            /**
             * This object contains information on when daylight savings starts for
             * different timezones.
             *
             * The list is short for a reason. Often we do not have to be very specific
             * to single out the correct timezone. But when we do, this list comes in
             * handy.
             *
             * Each value is a date denoting when daylight savings starts for that timezone.
             */
            dst_start_for = function (tz_name) {
  
              var ru_pre_dst_change = new Date(2010, 6, 15, 1, 0, 0, 0), // In 2010 Russia had DST, this allows us to detect Russia :)
                  dst_starts = {
                      'America/Denver': new Date(2011, 2, 13, 3, 0, 0, 0),
                      'America/Mazatlan': new Date(2011, 3, 3, 3, 0, 0, 0),
                      'America/Chicago': new Date(2011, 2, 13, 3, 0, 0, 0),
                      'America/Mexico_City': new Date(2011, 3, 3, 3, 0, 0, 0),
                      'America/Asuncion': new Date(2012, 9, 7, 3, 0, 0, 0),
                      'America/Santiago': new Date(2012, 9, 3, 3, 0, 0, 0),
                      'America/Campo_Grande': new Date(2012, 9, 21, 5, 0, 0, 0),
                      'America/Montevideo': new Date(2011, 9, 2, 3, 0, 0, 0),
                      'America/Sao_Paulo': new Date(2011, 9, 16, 5, 0, 0, 0),
                      'America/Los_Angeles': new Date(2011, 2, 13, 8, 0, 0, 0),
                      'America/Santa_Isabel': new Date(2011, 3, 5, 8, 0, 0, 0),
                      'America/Havana': new Date(2012, 2, 10, 2, 0, 0, 0),
                      'America/New_York': new Date(2012, 2, 10, 7, 0, 0, 0),
                      'Europe/Helsinki': new Date(2013, 2, 31, 5, 0, 0, 0),
                      'Pacific/Auckland': new Date(2011, 8, 26, 7, 0, 0, 0),
                      'America/Halifax': new Date(2011, 2, 13, 6, 0, 0, 0),
                      'America/Goose_Bay': new Date(2011, 2, 13, 2, 1, 0, 0),
                      'America/Miquelon': new Date(2011, 2, 13, 5, 0, 0, 0),
                      'America/Godthab': new Date(2011, 2, 27, 1, 0, 0, 0),
                      'Europe/Moscow': ru_pre_dst_change,
                      'Asia/Amman': new Date(2013, 2, 29, 1, 0, 0, 0),
                      'Asia/Beirut': new Date(2013, 2, 31, 2, 0, 0, 0),
                      'Asia/Damascus': new Date(2013, 3, 6, 2, 0, 0, 0),
                      'Asia/Jerusalem': new Date(2013, 2, 29, 5, 0, 0, 0),
                      'Asia/Yekaterinburg': ru_pre_dst_change,
                      'Asia/Omsk': ru_pre_dst_change,
                      'Asia/Krasnoyarsk': ru_pre_dst_change,
                      'Asia/Irkutsk': ru_pre_dst_change,
                      'Asia/Yakutsk': ru_pre_dst_change,
                      'Asia/Vladivostok': ru_pre_dst_change,
                      'Asia/Baku': new Date(2013, 2, 31, 4, 0, 0),
                      'Asia/Yerevan': new Date(2013, 2, 31, 3, 0, 0),
                      'Asia/Kamchatka': ru_pre_dst_change,
                      'Asia/Gaza': new Date(2010, 2, 27, 4, 0, 0),
                      'Africa/Cairo': new Date(2010, 4, 1, 3, 0, 0),
                      'Europe/Minsk': ru_pre_dst_change,
                      'Pacific/Apia': new Date(2010, 10, 1, 1, 0, 0, 0),
                      'Pacific/Fiji': new Date(2010, 11, 1, 0, 0, 0),
                      'Australia/Perth': new Date(2008, 10, 1, 1, 0, 0, 0)
                  };
  
                return dst_starts[tz_name];
            };
  
        return {
            determine: determine,
            date_is_dst: date_is_dst,
            dst_start_for: dst_start_for 
        };
    }());
  
    /**
     * Simple object to perform ambiguity check and to return name of time zone.
     */
    jstz.TimeZone = function (tz_name) {
        'use strict';
          /**
           * The keys in this object are timezones that we know may be ambiguous after
           * a preliminary scan through the olson_tz object.
           *
           * The array of timezones to compare must be in the order that daylight savings
           * starts for the regions.
           */
        var AMBIGUITIES = {
                'America/Denver':       ['America/Denver', 'America/Mazatlan'],
                'America/Chicago':      ['America/Chicago', 'America/Mexico_City'],
                'America/Santiago':     ['America/Santiago', 'America/Asuncion', 'America/Campo_Grande'],
                'America/Montevideo':   ['America/Montevideo', 'America/Sao_Paulo'],
                'Asia/Beirut':          ['Asia/Amman', 'Asia/Jerusalem', 'Asia/Beirut', 'Europe/Helsinki','Asia/Damascus'],
                'Pacific/Auckland':     ['Pacific/Auckland', 'Pacific/Fiji'],
                'America/Los_Angeles':  ['America/Los_Angeles', 'America/Santa_Isabel'],
                'America/New_York':     ['America/Havana', 'America/New_York'],
                'America/Halifax':      ['America/Goose_Bay', 'America/Halifax'],
                'America/Godthab':      ['America/Miquelon', 'America/Godthab'],
                'Asia/Dubai':           ['Europe/Moscow'],
                'Asia/Dhaka':           ['Asia/Yekaterinburg'],
                'Asia/Jakarta':         ['Asia/Omsk'],
                'Asia/Shanghai':        ['Asia/Krasnoyarsk', 'Australia/Perth'],
                'Asia/Tokyo':           ['Asia/Irkutsk'],
                'Australia/Brisbane':   ['Asia/Yakutsk'],
                'Pacific/Noumea':       ['Asia/Vladivostok'],
                'Pacific/Tarawa':       ['Asia/Kamchatka', 'Pacific/Fiji'],
                'Pacific/Tongatapu':    ['Pacific/Apia'],
                'Asia/Baghdad':         ['Europe/Minsk'],
                'Asia/Baku':            ['Asia/Yerevan','Asia/Baku'],
                'Africa/Johannesburg':  ['Asia/Gaza', 'Africa/Cairo']
            },
  
            timezone_name = tz_name,
            
            /**
             * Checks if a timezone has possible ambiguities. I.e timezones that are similar.
             *
             * For example, if the preliminary scan determines that we're in America/Denver.
             * We double check here that we're really there and not in America/Mazatlan.
             *
             * This is done by checking known dates for when daylight savings start for different
             * timezones during 2010 and 2011.
             */
            ambiguity_check = function () {
                var ambiguity_list = AMBIGUITIES[timezone_name],
                    length = ambiguity_list.length,
                    i = 0,
                    tz = ambiguity_list[0];
  
                for (; i < length; i += 1) {
                    tz = ambiguity_list[i];
  
                    if (jstz.date_is_dst(jstz.dst_start_for(tz))) {
                        timezone_name = tz;
                        return;
                    }
                }
            },
  
            /**
             * Checks if it is possible that the timezone is ambiguous.
             */
            is_ambiguous = function () {
                return typeof (AMBIGUITIES[timezone_name]) !== 'undefined';
            };
  
        if (is_ambiguous()) {
            ambiguity_check();
        }
  
        return {
            name: function () {
                return timezone_name;
            }
        };
    };
  
    jstz.olson = {};
  
    /*
     * The keys in this dictionary are comma separated as such:
     *
     * First the offset compared to UTC time in minutes.
     *
     * Then a flag which is 0 if the timezone does not take daylight savings into account and 1 if it
     * does.
     *
     * Thirdly an optional 's' signifies that the timezone is in the southern hemisphere,
     * only interesting for timezones with DST.
     *
     * The mapped arrays is used for constructing the jstz.TimeZone object from within
     * jstz.determine_timezone();
     */
    jstz.olson.timezones = {
        '-720,0'   : 'Pacific/Majuro',
        '-660,0'   : 'Pacific/Pago_Pago',
        '-600,1'   : 'America/Adak',
        '-600,0'   : 'Pacific/Honolulu',
        '-570,0'   : 'Pacific/Marquesas',
        '-540,0'   : 'Pacific/Gambier',
        '-540,1'   : 'America/Anchorage',
        '-480,1'   : 'America/Los_Angeles',
        '-480,0'   : 'Pacific/Pitcairn',
        '-420,0'   : 'America/Phoenix',
        '-420,1'   : 'America/Denver',
        '-360,0'   : 'America/Guatemala',
        '-360,1'   : 'America/Chicago',
        '-360,1,s' : 'Pacific/Easter',
        '-300,0'   : 'America/Bogota',
        '-300,1'   : 'America/New_York',
        '-270,0'   : 'America/Caracas',
        '-240,1'   : 'America/Halifax',
        '-240,0'   : 'America/Santo_Domingo',
        '-240,1,s' : 'America/Santiago',
        '-210,1'   : 'America/St_Johns',
        '-180,1'   : 'America/Godthab',
        '-180,0'   : 'America/Argentina/Buenos_Aires',
        '-180,1,s' : 'America/Montevideo',
        '-120,0'   : 'America/Noronha',
        '-120,1'   : 'America/Noronha',
        '-60,1'    : 'Atlantic/Azores',
        '-60,0'    : 'Atlantic/Cape_Verde',
        '0,0'      : 'UTC',
        '0,1'      : 'Europe/London',
        '60,1'     : 'Europe/Berlin',
        '60,0'     : 'Africa/Lagos',
        '60,1,s'   : 'Africa/Windhoek',
        '120,1'    : 'Asia/Beirut',
        '120,0'    : 'Africa/Johannesburg',
        '180,0'    : 'Asia/Baghdad',
        '180,1'    : 'Europe/Moscow',
        '210,1'    : 'Asia/Tehran',
        '240,0'    : 'Asia/Dubai',
        '240,1'    : 'Asia/Baku',
        '270,0'    : 'Asia/Kabul',
        '300,1'    : 'Asia/Yekaterinburg',
        '300,0'    : 'Asia/Karachi',
        '330,0'    : 'Asia/Kolkata',
        '345,0'    : 'Asia/Kathmandu',
        '360,0'    : 'Asia/Dhaka',
        '360,1'    : 'Asia/Omsk',
        '390,0'    : 'Asia/Rangoon',
        '420,1'    : 'Asia/Krasnoyarsk',
        '420,0'    : 'Asia/Jakarta',
        '480,0'    : 'Asia/Shanghai',
        '480,1'    : 'Asia/Irkutsk',
        '525,0'    : 'Australia/Eucla',
        '525,1,s'  : 'Australia/Eucla',
        '540,1'    : 'Asia/Yakutsk',
        '540,0'    : 'Asia/Tokyo',
        '570,0'    : 'Australia/Darwin',
        '570,1,s'  : 'Australia/Adelaide',
        '600,0'    : 'Australia/Brisbane',
        '600,1'    : 'Asia/Vladivostok',
        '600,1,s'  : 'Australia/Sydney',
        '630,1,s'  : 'Australia/Lord_Howe',
        '660,1'    : 'Asia/Kamchatka',
        '660,0'    : 'Pacific/Noumea',
        '690,0'    : 'Pacific/Norfolk',
        '720,1,s'  : 'Pacific/Auckland',
        '720,0'    : 'Pacific/Tarawa',
        '765,1,s'  : 'Pacific/Chatham',
        '780,0'    : 'Pacific/Tongatapu',
        '780,1,s'  : 'Pacific/Apia',
        '840,0'    : 'Pacific/Kiritimati'
    };
  
    if (typeof exports !== 'undefined') {
      exports.jstz = jstz;
    } else {
      root.jstz = jstz;
    }
  })(this);
  