The field specifies the default timezone for the group

HST (GMT-10:00) Hawaiian Standard Time: Pacific/Honolulu, AST (GMT-09:00) Alaskan Standard Time: America/Anchorage, PST (GMT-08:00) Pacific Standard Time: America/Los_Angeles, PNT (GMT-07:00) America/Phoenix, MST (GMT-07:00) US Mountain Standard Time: America/Denver, CST (GMT-06:00) Central Standard Time: America/Chicago, EST (GMT-05:00) Eastern Standard Time: America/New_York, IET (GMT-05:00) America/Indiana/Indianapolis, PRT (GMT-04:00) Atlantic Standard Time: America/Halifax, GMT (GMT-00:00) Greenwich Mean Time: GMT, ECT (GMT+01:00) Romance Standard Time: Europe/Paris, EET (GMT+02:00) Egypt Standard Time: Africa/Cairo, EAT (GMT+03:00) Saudi Arabia Standard Time: Asia/Riyadh, MET (GMT+03:30) Iran Standard Time: Asia/Tehran, NET (GMT+04:00) Arabian Standard Time: Asia/Yerevan, PLT (GMT+05:00) West Asia Standard Time: Asia/Karachi, IST (GMT+05:30) India Standard Time: Asia/Calcutta, BST (GMT+06:00) Central Asia Standard Time: Asia/Dacca, VST (GMT+07:00) Bangkok Standard Time: Asia/Bangkok, CTT (GMT+08:00) China Standard Time: Asia/Shanghai, JST (GMT+09:00) Tokyo Standard Time: Asia/Tokyo, ACT (GMT+09:30) Cen. Australia Standard Time: Australia/Darwin, AET (GMT+10:00) Sydney Standard Time: Australia/Sydney, SST (GMT+11:00) Central Pacific Standard Time: Pacific/Guadalcanal, NST (GMT+12:00) New Zealand Standard Time: Pacific/Fiji, MIT (GMT+13:00) Samoa Standard Time: Pacific/Apia, CNT (GMT-03:30) Newfoundland Standard Time: America/St_Johns, AGT (GMT-03:00) SA Eastern Standard Time: America/Buenos_Aires, BET (GMT-03:00) E South America Standard Time: America/Sao_Paulo, CAT (GMT-01:00) Azores Standard Time: Atlantic/Cape_Verde, Europe/Andorra, Asia/Dubai, Asia/Kabul, America/Antigua, America/Anguilla, Europe/Tirane, Asia/Yerevan, America/Curacao, Africa/Luanda, Antarctica/McMurdo, Antarctica/South_Pole, Antarctica/Rothera, Antarctica/Palmer, Antarctica/Mawson, Antarctica/Davis, Antarctica/Casey, Antarctica/Vostok, Antarctica/DumontDUrville, Antarctica/Syowa, America/Argentina/Buenos_Aires, America/Argentina/Cordoba, America/Argentina/Jujuy, America/Argentina/Tucuman, America/Argentina/Catamarca, America/Argentina/La_Rioja, America/Argentina/San_Juan, America/Argentina/Mendoza, America/Argentina/Rio_Gallegos, America/Argentina/Ushuaia, Pacific/Pago_Pago, Europe/Vienna, Australia/Lord_Howe, Australia/Hobart, Australia/Currie, Australia/Melbourne, Australia/Sydney, Australia/Broken_Hill, Australia/Brisbane, Australia/Lindeman, Australia/Adelaide, Australia/Darwin, Australia/Perth, America/Aruba, Europe/Mariehamn, Asia/Baku, Europe/Sarajevo, America/Barbados, Asia/Dhaka, Europe/Brussels, Africa/Ouagadougou, Europe/Sofia, Asia/Bahrain, Africa/Bujumbura, Africa/Porto-Novo, Atlantic/Bermuda, Asia/Brunei, America/La_Paz, America/Noronha, America/Belem, America/Fortaleza, America/Recife, America/Araguaina, America/Maceio, America/Bahia, America/Sao_Paulo, America/Campo_Grande, America/Cuiaba, America/Porto_Velho, America/Boa_Vista, America/Manaus, America/Eirunepe, America/Rio_Branco, America/Nassau, Asia/Thimphu, Africa/Gaborone, Europe/Minsk, America/Belize, America/St_Johns, America/Halifax, America/Glace_Bay, America/Moncton, America/Goose_Bay, America/Blanc-Sablon, America/Montreal, America/Toronto, America/Nipigon, America/Thunder_Bay, America/Pangnirtung, America/Iqaluit, America/Atikokan, America/Rankin_Inlet, America/Winnipeg, America/Rainy_River, America/Cambridge_Bay, America/Regina, America/Swift_Current, America/Edmonton, America/Yellowknife, America/Inuvik, America/Dawson_Creek, America/Vancouver, America/Whitehorse, America/Dawson, Indian/Cocos, Africa/Kinshasa, Africa/Lubumbashi, Africa/Bangui, Africa/Brazzaville, Europe/Zurich, Africa/Abidjan, Pacific/Rarotonga, America/Santiago, Pacific/Easter, Africa/Douala, Asia/Shanghai, Asia/Harbin, Asia/Chongqing, Asia/Urumqi, Asia/Kashgar, America/Bogota, America/Costa_Rica, America/Havana, Atlantic/Cape_Verde, Indian/Christmas, Asia/Nicosia, Europe/Prague, Europe/Berlin, Africa/Djibouti, Europe/Copenhagen, America/Dominica, America/Santo_Domingo, Africa/Algiers, America/Guayaquil, Pacific/Galapagos, Europe/Tallinn, Africa/Cairo, Africa/El_Aaiun, Africa/Asmara, Europe/Madrid, Africa/Ceuta, Atlantic/Canary, Africa/Addis_Ababa, Europe/Helsinki, Pacific/Fiji, Atlantic/Stanley, Pacific/Truk, Pacific/Ponape, Pacific/Kosrae, Atlantic/Faroe, Europe/Paris, Africa/Libreville, Europe/London, America/Grenada, Asia/Tbilisi, America/Cayenne, Europe/Guernsey, Africa/Accra, Europe/Gibraltar, America/Godthab, America/Danmarkshavn, America/Scoresbysund, America/Thule, Africa/Banjul, Africa/Conakry, America/Guadeloupe, Africa/Malabo, Europe/Athens, Atlantic/South_Georgia, America/Guatemala, Pacific/Guam, Africa/Bissau, America/Guyana, Asia/Hong_Kong, America/Tegucigalpa, Europe/Zagreb, America/Port-au-Prince, Europe/Budapest, Asia/Jakarta, Asia/Pontianak, Asia/Makassar, Asia/Jayapura, Europe/Dublin, Asia/Jerusalem, Europe/Isle_of_Man, Asia/Calcutta, Indian/Chagos, Asia/Baghdad, Asia/Tehran, Atlantic/Reykjavik, Europe/Rome, Europe/Jersey, America/Jamaica, Asia/Amman, Asia/Tokyo, Africa/Nairobi, Asia/Bishkek, Asia/Phnom_Penh, Pacific/Tarawa, Pacific/Enderbury, Pacific/Kiritimati, Indian/Comoro, America/St_Kitts, Asia/Pyongyang, Asia/Seoul, Asia/Kuwait, America/Cayman, Asia/Almaty, Asia/Qyzylorda, Asia/Aqtobe, Asia/Aqtau, Asia/Oral, Asia/Vientiane, Asia/Beirut, America/St_Lucia, Europe/Vaduz, Asia/Colombo, Africa/Monrovia, Africa/Maseru, Europe/Vilnius, Europe/Luxembourg, Europe/Riga, Africa/Tripoli, Africa/Casablanca, Europe/Monaco, Europe/Chisinau, Europe/Podgorica, Indian/Antananarivo, Pacific/Majuro, Pacific/Kwajalein, Europe/Skopje, Africa/Bamako, Asia/Rangoon, Asia/Ulaanbaatar, Asia/Hovd, Asia/Choibalsan, Asia/Macau, Pacific/Saipan, America/Martinique, Africa/Nouakchott, America/Montserrat, Europe/Malta, Indian/Mauritius, Indian/Maldives, Africa/Blantyre, America/Mexico_City, America/Cancun, America/Merida, America/Monterrey, America/Mazatlan, America/Chihuahua, America/Hermosillo, America/Tijuana, Asia/Kuala_Lumpur, Asia/Kuching, Africa/Maputo, Africa/Windhoek, Pacific/Noumea, Africa/Niamey, Pacific/Norfolk, Africa/Lagos, America/Managua, Europe/Amsterdam, Europe/Oslo, Asia/Katmandu, Pacific/Nauru, Pacific/Niue, Pacific/Auckland, Pacific/Chatham, Asia/Muscat, America/Panama, America/Lima, Pacific/Tahiti, Pacific/Marquesas, Pacific/Gambier, Pacific/Port_Moresby, Asia/Manila, Asia/Karachi, Europe/Warsaw, America/Miquelon, Pacific/Pitcairn, America/Puerto_Rico, Asia/Gaza, Europe/Lisbon, Atlantic/Madeira, Atlantic/Azores, Pacific/Palau, America/Asuncion, Asia/Qatar, Indian/Reunion, Europe/Bucharest, Europe/Belgrade, Europe/Kaliningrad, Europe/Moscow, Europe/Volgograd, Europe/Samara, Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk, Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Sakhalin, Asia/Magadan, Asia/Kamchatka, Asia/Anadyr, Africa/Kigali, Asia/Riyadh, Pacific/Guadalcanal, Indian/Mahe, Africa/Khartoum, Europe/Stockholm, Asia/Singapore, Atlantic/St_Helena, Europe/Ljubljana, Arctic/Longyearbyen, Atlantic/Jan_Mayen, Europe/Bratislava, Africa/Freetown, Europe/San_Marino, Africa/Dakar, Africa/Mogadishu, America/Paramaribo, Africa/Sao_Tome, America/El_Salvador, Asia/Damascus, Africa/Mbabane, America/Grand_Turk, Africa/Ndjamena, Indian/Kerguelen, Africa/Lome, Asia/Bangkok, Asia/Dushanbe, Pacific/Fakaofo, Asia/Dili, Asia/Ashgabat, Africa/Tunis, Pacific/Tongatapu, Europe/Istanbul, America/Port_of_Spain, Pacific/Funafuti, Asia/Taipei, Africa/Dar_es_Salaam, Europe/Kiev, Europe/Uzhgorod, Europe/Zaporozhye, Europe/Simferopol, Africa/Kampala, Pacific/Johnston, Pacific/Midway, Pacific/Wake, America/New_York, America/Detroit, America/Kentucky/Louisville, America/Kentucky/Monticello, America/Indiana/Indianapolis, America/Indiana/Marengo, America/Indiana/Knox, America/Indiana/Vevay, America/Chicago, America/Indiana/Vincennes, America/Indiana/Petersburg, America/Menominee, America/North_Dakota/Center, America/North_Dakota/New_Salem, America/Denver, America/Boise, America/Shiprock, America/Phoenix, America/Los_Angeles, America/Anchorage, America/Juneau, America/Yakutat, America/Nome, America/Adak, Pacific/Honolulu, America/Montevideo, Asia/Samarkand, Asia/Tashkent, Europe/Vatican, America/St_Vincent, America/Caracas, America/Tortola, America/St_Thomas, Asia/Saigon, Pacific/Efate, Pacific/Wallis, Pacific/Apia, Asia/Aden, Indian/Mayotte, Africa/Johannesburg, Africa/Lusaka, Africa/Harare, Australia/Eucla, America/Indiana/Tell_City, America/Indiana/Winamac, America/Resolute, America/Marigot, Asia/Kolkata, Asia/Ho_Chi_Minh, America/St_Barthelemy, America/Argentina/San_Luis, America/Santarem, America/Argentina/Salta, Asia/Kathmandu, America/Ojinaga, America/Santa_Isabel, Asia/Novokuznetsk, America/Matamoros, Antarctica/Macquarie, America/Bahia_Banderas, Pacific/Pohnpei, Pacific/Chuuk, America/North_Dakota/Beulah, America/Metlakatla, America/Sitka, America/Kralendijk, America/Lower_Princes, Africa/Juba, Asia/Hebron, Europe/Tiraspol, America/Creston, Asia/Khandyga, Europe/Busingen, Asia/Ust-Nera