Timezones… They can be difficult to work with on a global platform like the web. Some systems we help you interact want a timezone in the form of an abbreviation (EST – US Eastern Standard Time), some want it in an UTC offset (UTC-0500), and some want them in a computerized zone (America/New_York) where they auto figure out the time zone by location.

Add in Daylight savings time, and not every location uses it, and those that do have can have different starting and ending dates, well your service in one country collecting information for an event in another country, can drive you mad.

For many places where we ask for a TimeZone, we accept the computerized zones (listed below), where you pick the one that is closest to your location, then the servers figure out all the adjustments for you. For in the US, to make things we adapt over the abbreviations Eastern/EST/EDT, Central/CST/CDT, Mountain/MST/MDT, and Pacific/PST/PDT over to those zones for you.

Africa
Africa/Abidjan Africa/Accra Africa/Addis_Ababa Africa/Algiers
Africa/Asmara Africa/Bamako Africa/Bangui Africa/Banjul
Africa/Bissau Africa/Blantyre Africa/Brazzaville Africa/Bujumbura
Africa/Cairo Africa/Casablanca Africa/Ceuta Africa/Conakry
Africa/Dakar Africa/Dar_es_Salaam Africa/Djibouti Africa/Douala
Africa/El_Aaiun Africa/Freetown Africa/Gaborone Africa/Harare
Africa/Johannesburg Africa/Juba Africa/Kampala Africa/Khartoum
Africa/Kigali Africa/Kinshasa Africa/Lagos Africa/Libreville
Africa/Lome Africa/Luanda Africa/Lubumbashi Africa/Lusaka
Africa/Malabo Africa/Maputo Africa/Maseru Africa/Mbabane
Africa/Mogadishu Africa/Monrovia Africa/Nairobi Africa/Ndjamena
Africa/Niamey Africa/Nouakchott Africa/Ouagadougou Africa/Porto-Novo
Africa/Sao_Tome Africa/Tripoli Africa/Tunis Africa/Windhoek
America
America/Adak America/Anchorage America/Anguilla America/Antigua
America/Araguaina America/Argentina/Buenos_Aires America/Argentina/Catamarca America/Argentina/Cordoba
America/Argentina/Jujuy America/Argentina/La_Rioja America/Argentina/Mendoza America/Argentina/Rio_Gallegos
America/Argentina/Salta America/Argentina/San_Juan America/Argentina/San_Luis America/Argentina/Tucuman
America/Argentina/Ushuaia America/Aruba America/Asuncion America/Atikokan
America/Bahia America/Bahia_Banderas America/Barbados America/Belem
America/Belize America/Blanc-Sablon America/Boa_Vista America/Bogota
America/Boise America/Cambridge_Bay America/Campo_Grande America/Cancun
America/Caracas America/Cayenne America/Cayman America/Chicago
America/Chihuahua America/Costa_Rica America/Creston America/Cuiaba
America/Curacao America/Danmarkshavn America/Dawson America/Dawson_Creek
America/Denver America/Detroit America/Dominica America/Edmonton
America/Eirunepe America/El_Salvador America/Fort_Nelson America/Fortaleza
America/Glace_Bay America/Godthab America/Goose_Bay America/Grand_Turk
America/Grenada America/Guadeloupe America/Guatemala America/Guayaquil
America/Guyana America/Halifax America/Havana America/Hermosillo
America/Indiana/Indianapolis America/Indiana/Knox America/Indiana/Marengo America/Indiana/Petersburg
America/Indiana/Tell_City America/Indiana/Vevay America/Indiana/Vincennes America/Indiana/Winamac
America/Inuvik America/Iqaluit America/Jamaica America/Juneau
America/Kentucky/Louisville America/Kentucky/Monticello America/Kralendijk America/La_Paz
America/Lima America/Los_Angeles America/Lower_Princes America/Maceio
America/Managua America/Manaus America/Marigot America/Martinique
America/Matamoros America/Mazatlan America/Menominee America/Merida
America/Metlakatla America/Mexico_City America/Miquelon America/Moncton
America/Monterrey America/Montevideo America/Montserrat America/Nassau
America/New_York America/Nipigon America/Nome America/Noronha
America/North_Dakota/Beulah America/North_Dakota/Center America/North_Dakota/New_Salem America/Ojinaga
America/Panama America/Pangnirtung America/Paramaribo America/Phoenix
America/Port-au-Prince America/Port_of_Spain America/Porto_Velho America/Puerto_Rico
America/Punta_Arenas America/Rainy_River America/Rankin_Inlet America/Recife
America/Regina America/Resolute America/Rio_Branco America/Santarem
America/Santiago America/Santo_Domingo America/Sao_Paulo America/Scoresbysund
America/Sitka America/St_Barthelemy America/St_Johns America/St_Kitts
America/St_Lucia America/St_Thomas America/St_Vincent America/Swift_Current
America/Tegucigalpa America/Thule America/Thunder_Bay America/Tijuana
America/Toronto America/Tortola America/Vancouver America/Whitehorse
America/Winnipeg America/Yakutat America/Yellowknife
Antarctica / Artic
Antarctica/Casey Antarctica/Davis Antarctica/DumontDUrville Antarctica/Macquarie
Antarctica/Mawson Antarctica/McMurdo Antarctica/Palmer Antarctica/Rothera
Antarctica/Syowa Antarctica/Troll Antarctica/Vostok Arctic/Longyearbyen
Asia
Asia/Aden Asia/Almaty Asia/Amman Asia/Anadyr
Asia/Aqtau Asia/Aqtobe Asia/Ashgabat Asia/Atyrau
Asia/Baghdad Asia/Bahrain Asia/Baku Asia/Bangkok
Asia/Barnaul Asia/Beirut Asia/Bishkek Asia/Brunei
Asia/Chita Asia/Choibalsan Asia/Colombo Asia/Damascus
Asia/Dhaka Asia/Dili Asia/Dubai Asia/Dushanbe
Asia/Famagusta Asia/Gaza Asia/Hebron Asia/Ho_Chi_Minh
Asia/Hong_Kong Asia/Hovd Asia/Irkutsk Asia/Jakarta
Asia/Jayapura Asia/Jerusalem Asia/Kabul Asia/Kamchatka
Asia/Karachi Asia/Kathmandu Asia/Khandyga Asia/Kolkata
Asia/Krasnoyarsk Asia/Kuala_Lumpur Asia/Kuching Asia/Kuwait
Asia/Macau Asia/Magadan Asia/Makassar Asia/Manila
Asia/Muscat Asia/Nicosia Asia/Novokuznetsk Asia/Novosibirsk
Asia/Omsk Asia/Oral Asia/Phnom_Penh Asia/Pontianak
Asia/Pyongyang Asia/Qatar Asia/Qyzylorda Asia/Riyadh
Asia/Sakhalin Asia/Samarkand Asia/Seoul Asia/Shanghai
Asia/Singapore Asia/Srednekolymsk Asia/Taipei Asia/Tashkent
Asia/Tbilisi Asia/Tehran Asia/Thimphu Asia/Tokyo
Asia/Tomsk Asia/Ulaanbaatar Asia/Urumqi Asia/Ust-Nera
Asia/Vientiane Asia/Vladivostok Asia/Yakutsk Asia/Yangon
Asia/Yekaterinburg Asia/Yerevan
Atlantic
Atlantic/Azores Atlantic/Bermuda Atlantic/Canary Atlantic/Cape_Verde
Atlantic/Faroe Atlantic/Madeira Atlantic/Reykjavik Atlantic/South_Georgia
Atlantic/St_Helena Atlantic/Stanley
Australia
Australia/Adelaide Australia/Brisbane Australia/Broken_Hill Australia/Currie
Australia/Darwin Australia/Eucla Australia/Hobart Australia/Lindeman
Australia/Lord_Howe Australia/Melbourne Australia/Perth Australia/Sydney
Europe
Europe/Amsterdam Europe/Andorra Europe/Astrakhan Europe/Athens
Europe/Belgrade Europe/Berlin Europe/Bratislava Europe/Brussels
Europe/Bucharest Europe/Budapest Europe/Busingen Europe/Chisinau
Europe/Copenhagen Europe/Dublin Europe/Gibraltar Europe/Guernsey
Europe/Helsinki Europe/Isle_of_Man Europe/Istanbul Europe/Jersey
Europe/Kaliningrad Europe/Kiev Europe/Kirov Europe/Lisbon
Europe/Ljubljana Europe/London Europe/Luxembourg Europe/Madrid
Europe/Malta Europe/Mariehamn Europe/Minsk Europe/Monaco
Europe/Moscow Europe/Oslo Europe/Paris Europe/Podgorica
Europe/Prague Europe/Riga Europe/Rome Europe/Samara
Europe/San_Marino Europe/Sarajevo Europe/Saratov Europe/Simferopol
Europe/Skopje Europe/Sofia Europe/Stockholm Europe/Tallinn
Europe/Tirane Europe/Ulyanovsk Europe/Uzhgorod Europe/Vaduz
Europe/Vatican Europe/Vienna Europe/Vilnius Europe/Volgograd
Europe/Warsaw Europe/Zagreb Europe/Zaporozhye Europe/Zurich
Indian
Indian/Antananarivo Indian/Chagos Indian/Christmas Indian/Cocos
Indian/Comoro Indian/Kerguelen Indian/Mahe Indian/Maldives
Indian/Mauritius Indian/Mayotte Indian/Reunion
Pacific
Pacific/Apia Pacific/Auckland Pacific/Bougainville Pacific/Chatham
Pacific/Chuuk Pacific/Easter Pacific/Efate Pacific/Enderbury
Pacific/Fakaofo Pacific/Fiji Pacific/Funafuti Pacific/Galapagos
Pacific/Gambier Pacific/Guadalcanal Pacific/Guam Pacific/Honolulu
Pacific/Kiritimati Pacific/Kosrae Pacific/Kwajalein Pacific/Majuro
Pacific/Marquesas Pacific/Midway Pacific/Nauru Pacific/Niue
Pacific/Norfolk Pacific/Noumea Pacific/Pago_Pago Pacific/Palau
Pacific/Pitcairn Pacific/Pohnpei Pacific/Port_Moresby Pacific/Rarotonga
Pacific/Saipan Pacific/Tahiti Pacific/Tarawa Pacific/Tongatapu
Pacific/Wake Pacific/Wallis