STO Time Zone IDs

The Time Zone Send Time Optimization (STO) option lets you optimize Campaign deployment based on each recipient's local time zone. To use this feature, the Campaign's source table must have a string-type field that stores the Time Zone ID value for each recipient. The table below lists every time zone and its corresponding Time Zone ID.

Time Zone	Time Zone ID
(UTC-12:00) International Date Line West	Dateline Standard Time
(UTC-11:00) Coordinated Universal Time-11	UTC-11
(UTC-10:00) Aleutian Islands	Aleutian Standard Time
(UTC-10:00) Hawaii	Hawaiian Standard Time
(UTC-09:30) Marquesas Islands	Marquesas Standard Time
(UTC-09:00) Alaska	Alaskan Standard Time
(UTC-09:00) Coordinated Universal Time-09	UTC-09
(UTC-08:00) Baja California	Pacific Standard Time (Mexico)
(UTC-08:00) Coordinated Universal Time-08	UTC-08
(UTC-08:00) Pacific Time (US & Canada)	Pacific Standard Time
(UTC-07:00) Arizona	US Mountain Standard Time
(UTC-07:00) Chihuahua, La Paz, Mazatlan	Mountain Standard Time (Mexico)
(UTC-07:00) Mountain Time (US & Canada)	Mountain Standard Time
(UTC-06:00) Central America	Central America Standard Time
(UTC-06:00) Central Time (US & Canada)	Central Standard Time
(UTC-06:00) Easter Island	Easter Island Standard Time
(UTC-06:00) Guadalajara, Mexico City, Monterrey	Central Standard Time (Mexico)
(UTC-06:00) Saskatchewan	Canada Central Standard Time
(UTC-05:00) Bogota, Lima, Quito, Rio Branco	SA Pacific Standard Time
(UTC-05:00) Chetumal	Eastern Standard Time (Mexico)
(UTC-05:00) Eastern Time (US & Canada)	Eastern Standard Time
(UTC-05:00) Haiti	Haiti Standard Time
(UTC-05:00) Havana	Cuba Standard Time
(UTC-05:00) Indiana (East)	US Eastern Standard Time
(UTC-05:00) Turks and Caicos	Turks And Caicos Standard Time
(UTC-04:00) Asuncion	Paraguay Standard Time
(UTC-04:00) Atlantic Time (Canada)	Atlantic Standard Time
(UTC-04:00) Caracas	Venezuela Standard Time
(UTC-04:00) Cuiaba	Central Brazilian Standard Time
(UTC-04:00) Georgetown, La Paz, Manaus, San Juan	SA Western Standard Time
(UTC-04:00) Santiago	Pacific SA Standard Time
(UTC-03:30) Newfoundland	Newfoundland Standard Time
(UTC-03:00) Araguaina	Tocantins Standard Time
(UTC-03:00) Brasilia	E. South America Standard Time
(UTC-03:00) Cayenne, Fortaleza	SA Eastern Standard Time
(UTC-03:00) City of Buenos Aires	Argentina Standard Time
(UTC-03:00) Greenland	Greenland Standard Time
(UTC-03:00) Montevideo	Montevideo Standard Time
(UTC-03:00) Punta Arenas	Magallanes Standard Time
(UTC-03:00) Saint Pierre and Miquelon	Saint Pierre Standard Time
(UTC-03:00) Salvador	Bahia Standard Time
(UTC-02:00) Coordinated Universal Time-02	UTC-02
(UTC-02:00) Mid-Atlantic - Old	Mid-Atlantic Standard Time
(UTC-01:00) Azores	Azores Standard Time
(UTC-01:00) Cabo Verde Is.	Cape Verde Standard Time
(UTC) Coordinated Universal Time	UTC
(UTC+00:00) Dublin, Edinburgh, Lisbon, London	GMT Standard Time
(UTC+00:00) Monrovia, Reykjavik	Greenwich Standard Time
(UTC+00:00) Sao Tome	Sao Tome Standard Time
(UTC+01:00) Casablanca	Morocco Standard Time
(UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna	W. Europe Standard Time
(UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague	Central Europe Standard Time
(UTC+01:00) Brussels, Copenhagen, Madrid, Paris	Romance Standard Time
(UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb	Central European Standard Time
(UTC+01:00) West Central Africa	W. Central Africa Standard Time
(UTC+02:00) Amman	Jordan Standard Time
(UTC+02:00) Athens, Bucharest	GTB Standard Time
(UTC+02:00) Beirut	Middle East Standard Time
(UTC+02:00) Cairo	Egypt Standard Time
(UTC+02:00) Chisinau	E. Europe Standard Time
(UTC+02:00) Damascus	Syria Standard Time
(UTC+02:00) Gaza, Hebron	West Bank Standard Time
(UTC+02:00) Harare, Pretoria	South Africa Standard Time
(UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius	FLE Standard Time
(UTC+02:00) Jerusalem	Israel Standard Time
(UTC+02:00) Kaliningrad	Kaliningrad Standard Time
(UTC+02:00) Khartoum	Sudan Standard Time
(UTC+02:00) Tripoli	Libya Standard Time
(UTC+02:00) Windhoek	Namibia Standard Time
(UTC+03:00) Baghdad	Arabic Standard Time
(UTC+03:00) Istanbul	Turkey Standard Time
(UTC+03:00) Kuwait, Riyadh	Arab Standard Time
(UTC+03:00) Minsk	Belarus Standard Time
(UTC+03:00) Moscow, St. Petersburg	Russian Standard Time
(UTC+03:00) Nairobi	E. Africa Standard Time
(UTC+03:30) Tehran	Iran Standard Time
(UTC+04:00) Abu Dhabi, Muscat	Arabian Standard Time
(UTC+04:00) Astrakhan, Ulyanovsk	Astrakhan Standard Time
(UTC+04:00) Baku	Azerbaijan Standard Time
(UTC+04:00) Izhevsk, Samara	Russia Time Zone 3
(UTC+04:00) Port Louis	Mauritius Standard Time
(UTC+04:00) Saratov	Saratov Standard Time
(UTC+04:00) Tbilisi	Georgian Standard Time
(UTC+04:00) Volgograd	Volgograd Standard Time
(UTC+04:00) Yerevan	Caucasus Standard Time
(UTC+04:30) Kabul	Afghanistan Standard Time
(UTC+05:00) Ashgabat, Tashkent	West Asia Standard Time
(UTC+05:00) Ekaterinburg	Ekaterinburg Standard Time
(UTC+05:00) Islamabad, Karachi	Pakistan Standard Time
(UTC+05:00) Qyzylorda	Qyzylorda Standard Time
(UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi	India Standard Time
(UTC+05:30) Sri Jayawardenepura	Sri Lanka Standard Time
(UTC+05:45) Kathmandu	Nepal Standard Time
(UTC+06:00) Astana	Central Asia Standard Time
(UTC+06:00) Dhaka	Bangladesh Standard Time
(UTC+06:00) Omsk	Omsk Standard Time
(UTC+06:30) Yangon (Rangoon)	Myanmar Standard Time
(UTC+07:00) Bangkok, Hanoi, Jakarta	SE Asia Standard Time
(UTC+07:00) Barnaul, Gorno-Altaysk	Altai Standard Time
(UTC+07:00) Hovd	W. Mongolia Standard Time
(UTC+07:00) Krasnoyarsk	North Asia Standard Time
(UTC+07:00) Novosibirsk	N. Central Asia Standard Time
(UTC+07:00) Tomsk	Tomsk Standard Time
(UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi	China Standard Time
(UTC+08:00) Irkutsk	North Asia East Standard Time
(UTC+08:00) Kuala Lumpur, Singapore	Singapore Standard Time
(UTC+08:00) Perth	W. Australia Standard Time
(UTC+08:00) Taipei	Taipei Standard Time
(UTC+08:00) Ulaanbaatar	Ulaanbaatar Standard Time
(UTC+08:45) Eucla	Aus Central W. Standard Time
(UTC+09:00) Chita	Transbaikal Standard Time
(UTC+09:00) Osaka, Sapporo, Tokyo	Tokyo Standard Time
(UTC+09:00) Pyongyang	North Korea Standard Time
(UTC+09:00) Seoul	Korea Standard Time
(UTC+09:00) Yakutsk	Yakutsk Standard Time
(UTC+09:30) Adelaide	Cen. Australia Standard Time
(UTC+09:30) Darwin	AUS Central Standard Time
(UTC+10:00) Brisbane	E. Australia Standard Time
(UTC+10:00) Canberra, Melbourne, Sydney	AUS Eastern Standard Time
(UTC+10:00) Guam, Port Moresby	West Pacific Standard Time
(UTC+10:00) Hobart	Tasmania Standard Time
(UTC+10:00) Vladivostok	Vladivostok Standard Time
(UTC+10:30) Lord Howe Island	Lord Howe Standard Time
(UTC+11:00) Bougainville Island	Bougainville Standard Time
(UTC+11:00) Chokurdakh	Russia Time Zone 10
(UTC+11:00) Magadan	Magadan Standard Time
(UTC+11:00) Norfolk Island	Norfolk Standard Time
(UTC+11:00) Sakhalin	Sakhalin Standard Time
(UTC+11:00) Solomon Is., New Caledonia	Central Pacific Standard Time
(UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky	Russia Time Zone 11
(UTC+12:00) Auckland, Wellington	New Zealand Standard Time
(UTC+12:00) Coordinated Universal Time+12	UTC+12
(UTC+12:00) Fiji	Fiji Standard Time
(UTC+12:00) Petropavlovsk-Kamchatsky - Old	Kamchatka Standard Time
(UTC+12:45) Chatham Islands	Chatham Islands Standard Time
(UTC+13:00) Coordinated Universal Time+13	UTC+13
(UTC+13:00) Nuku'alofa	Tonga Standard Time
(UTC+13:00) Samoa	Samoa Standard Time
(UTC+14:00) Kiritimati Island	Line Islands Standard Time