| Windows Display Name | Windows ID | Preferred Response | Moment Guess | Result | January Offset | July Offset | Notes |
|---|---|---|---|---|---|---|---|
| (UTC-12:00) International Date Line West | Dateline Standard Time | Etc/GMT+12 | Etc/GMT+12 | Match | -12:00 | -12:00 | |
| (UTC-11:00) Coordinated Universal Time-11 | UTC-11 | Etc/GMT+11 | Pacific/Pago_Pago | Acceptable | -11:00 | -11:00 | |
| (UTC-10:00) Hawaii | Hawaiian Standard Time | Pacific/Honolulu | Pacific/Honolulu | Match | -10:00 | -10:00 | |
| (UTC-09:00) Alaska | Alaskan Standard Time | America/Anchorage | America/Anchorage | Match | -09:00 | -08:00 | |
| (UTC-08:00) Pacific Time (US & Canada) | Pacific Standard Time | America/Los_Angeles | America/Los_Angeles | Match | -08:00 | -07:00 | |
| (UTC-08:00) Baja California | Pacific Standard Time (Mexico) | America/Santa_Isabel | America/Los_Angeles | Mismatch | -08:00 | -07:00 | |
| (UTC-07:00) Arizona | US Mountain Standard Time | America/Phoenix | America/Phoenix | Match | -07:00 | -07:00 | |
| (UTC-07:00) Mountain Time (US & Canada) | Mountain Standard Time | America/Denver | America/Denver | Match | -07:00 | -06:00 | |
| (UTC-07:00) Chihuahua, La Paz, Mazatlan | Mountain Standard Time (Mexico) | America/Chihuahua | America/Denver | Mismatch | -07:00 | -06:00 | |
| (UTC-06:00) Central America | Central America Standard Time | America/Guatemala | America/Guatemala | Match | -06:00 | -06:00 | |
| (UTC-06:00) Central Time (US & Canada) | Central Standard Time | America/Chicago | America/Chicago | Match | -06:00 | -05:00 | |
| (UTC-06:00) Guadalajara, Mexico City, Monterrey | Central Standard Time (Mexico) | America/Mexico_City | America/Chicago | Mismatch | -06:00 | -05:00 | |
| (UTC-06:00) Saskatchewan | Canada Central Standard Time | America/Regina | America/Guatemala | Mismatch | -06:00 | -06:00 | |
| (UTC-05:00) Chetumal | Eastern Standard Time (Mexico) | America/Cancun | Pacific/Easter | Mismatch | -05:00 | -05:00 | |
| (UTC-05:00) Bogota, Lima, Quito, Rio Branco | SA Pacific Standard Time | America/Bogota | Pacific/Easter | Mismatch | -05:00 | -05:00 | |
| (UTC-05:00) Eastern Time (US & Canada) | Eastern Standard Time | America/New_York | America/New_York | Match | -05:00 | -04:00 | |
| (UTC-05:00) Indiana (East) | US Eastern Standard Time | America/Indianapolis | America/New_York | Mismatch | -05:00 | -04:00 | |
| (UTC-04:30) Caracas | Venezuela Standard Time | America/Caracas | America/Caracas | Match | -04:30 | -04:30 | |
| (UTC-04:00) Atlantic Time (Canada) | Atlantic Standard Time | America/Halifax | America/Halifax | Match | -04:00 | -03:00 | |
| (UTC-04:00) Cuiaba | Central Brazilian Standard Time | America/Cuiaba | America/Campo_Grande | Acceptable | -03:00 | -04:00 | |
| (UTC-04:00) Asuncion | Paraguay Standard Time | America/Asuncion | America/Campo_Grande | Mismatch | -03:00 | -04:00 | |
| (UTC-04:00) Georgetown, La Paz, Manaus, San Juan | SA Western Standard Time | America/La_Paz | America/Santo_Domingo | Acceptable | -04:00 | -04:00 | |
| (UTC-03:30) Newfoundland | Newfoundland Standard Time | America/St_Johns | America/St_Johns | Match | -03:30 | -02:30 | |
| (UTC-03:00) Greenland | Greenland Standard Time | America/Godthab | America/Godthab | Match | -03:00 | -02:00 | |
| (UTC-03:00) Montevideo | Montevideo Standard Time | America/Montevideo | America/Montevideo | Match | -02:00 | -03:00 | No DST with 2015f |
| (UTC-03:00) Brasilia | E. South America Standard Time | America/Sao_Paulo | America/Montevideo | Mismatch | -02:00 | -03:00 | |
| (UTC-03:00) Santiago | Pacific SA Standard Time | America/Santiago | America/Santiago | Match | -03:00 | -03:00 | |
| (UTC-03:00) Salvador | Bahia Standard Time | America/Bahia | America/Santiago | Mismatch | -03:00 | -03:00 | |
| (UTC-03:00) Cayenne, Fortaleza | SA Eastern Standard Time | America/Cayenne | America/Santiago | Mismatch | -03:00 | -03:00 | |
| (UTC-03:00) City of Buenos Aires | Argentina Standard Time | America/Buenos_Aires | America/Santiago | Mismatch | -03:00 | -03:00 | |
| (UTC-02:00) Coordinated Universal Time-02 | UTC-02 | Etc/GMT+2 | America/Noronha | Acceptable | -02:00 | -02:00 | |
| (UTC-01:00) Azores | Azores Standard Time | Atlantic/Azores | Atlantic/Azores | Match | -01:00 | +00:00 | |
| (UTC-01:00) Cabo Verde Is. | Cape Verde Standard Time | Atlantic/Cape_Verde | Atlantic/Cape_Verde | Match | -01:00 | -01:00 | |
| (UTC) Dublin, Edinburgh, Lisbon, London | GMT Standard Time | Europe/London | Europe/London | Match | +00:00 | +01:00 | |
| (UTC) Casablanca | Morocco Standard Time | Africa/Casablanca | Europe/London | Mismatch | +00:00 | +01:00 | Ramadan may interfere with summer detection |
| (UTC) Coordinated Universal Time | UTC | Etc/UTC | Etc/UTC | Match | +00:00 | +00:00 | |
| (UTC) Monrovia, Reykjavik | Greenwich Standard Time | Atlantic/Reykjavik | Etc/UTC | Mismatch | +00:00 | +00:00 | |
| (UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna | W. Europe Standard Time | Europe/Berlin | Europe/Berlin | Match | +01:00 | +02:00 | |
| (UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague | Central Europe Standard Time | Europe/Budapest | Europe/Berlin | Mismatch | +01:00 | +02:00 | |
| (UTC+01:00) Brussels, Copenhagen, Madrid, Paris | Romance Standard Time | Europe/Paris | Europe/Berlin | Mismatch | +01:00 | +02:00 | |
| (UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb | Central European Standard Time | Europe/Warsaw | Europe/Berlin | Mismatch | +01:00 | +02:00 | |
| (UTC+01:00) Windhoek | Namibia Standard Time | Africa/Windhoek | Africa/Windhoek | Match | +02:00 | +01:00 | |
| (UTC+01:00) West Central Africa | W. Central Africa Standard Time | Africa/Lagos | Africa/Lagos | Match | +01:00 | +01:00 | |
| (UTC+02:00) Beirut | Middle East Standard Time | Asia/Beirut | Asia/Beirut | Match | +02:00 | +03:00 | |
| (UTC+02:00) Amman | Jordan Standard Time | Asia/Amman | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Athens, Bucharest | GTB Standard Time | Europe/Bucharest | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius | FLE Standard Time | Europe/Kiev | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Istanbul | Turkey Standard Time | Europe/Istanbul | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Jerusalem | Israel Standard Time | Asia/Jerusalem | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Damascus | Syria Standard Time | Asia/Damascus | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) E. Europe | E. Europe Standard Time | Europe/Bucharest | Asia/Beirut | Mismatch | +02:00 | +03:00 | |
| (UTC+02:00) Harare, Pretoria | South Africa Standard Time | Africa/Johannesburg | Africa/Johannesburg | Match | +02:00 | +02:00 | |
| (UTC+02:00) Cairo | Egypt Standard Time | Africa/Cairo | Africa/Johannesburg | Mismatch | +02:00 | +02:00 | |
| (UTC+02:00) Kaliningrad (RTZ 1) | Kaliningrad Standard Time | Europe/Kaliningrad | Africa/Johannesburg | Mismatch | +02:00 | +02:00 | |
| (UTC+02:00) Tripoli | Libya Standard Time | Africa/Tripoli | Africa/Johannesburg | Mismatch | +02:00 | +02:00 | |
| (UTC+03:00) Moscow, St. Petersburg, Volgograd (RTZ 2) | Russian Standard Time | Europe/Moscow | Europe/Moscow | Match | +03:00 | +03:00 | |
| (UTC+03:00) Baghdad | Arabic Standard Time | Asia/Baghdad | Europe/Moscow | Mismatch | +03:00 | +03:00 | |
| (UTC+03:00) Kuwait, Riyadh | Arab Standard Time | Asia/Riyadh | Europe/Moscow | Mismatch | +03:00 | +03:00 | |
| (UTC+03:00) Minsk | Belarus Standard Time | Europe/Minsk | Europe/Moscow | Mismatch | +03:00 | +03:00 | |
| (UTC+03:00) Nairobi | E. Africa Standard Time | Africa/Nairobi | Europe/Moscow | Mismatch | +03:00 | +03:00 | |
| (UTC+03:30) Tehran | Iran Standard Time | Asia/Tehran | Asia/Tehran | Match | +03:30 | +04:30 | |
| (UTC+04:00) Abu Dhabi, Muscat | Arabian Standard Time | Asia/Dubai | Asia/Dubai | Match | +04:00 | +04:00 | |
| (UTC+04:00) Izhevsk, Samara (RTZ 3) | Russia Time Zone 3 | Europe/Samara | Asia/Dubai | Mismatch | +04:00 | +04:00 | |
| (UTC+04:00) Port Louis | Mauritius Standard Time | Indian/Mauritius | Asia/Dubai | Mismatch | +04:00 | +04:00 | |
| (UTC+04:00) Tbilisi | Georgian Standard Time | Asia/Tbilisi | Asia/Dubai | Mismatch | +04:00 | +04:00 | |
| (UTC+04:00) Yerevan | Caucasus Standard Time | Asia/Yerevan | Asia/Dubai | Mismatch | +04:00 | +04:00 | |
| (UTC+04:00) Baku | Azerbaijan Standard Time | Asia/Baku | Asia/Baku | Match | +04:00 | +05:00 | |
| (UTC+04:30) Kabul | Afghanistan Standard Time | Asia/Kabul | Asia/Kabul | Match | +04:30 | +04:30 | |
| (UTC+05:00) Ekaterinburg (RTZ 4) | Ekaterinburg Standard Time | Asia/Yekaterinburg | Asia/Yekaterinburg | Match | +05:00 | +05:00 | |
| (UTC+05:00) Ashgabat, Tashkent | West Asia Standard Time | Asia/Tashkent | Asia/Yekaterinburg | Mismatch | +05:00 | +05:00 | |
| (UTC+05:00) Islamabad, Karachi | Pakistan Standard Time | Asia/Karachi | Asia/Yekaterinburg | Mismatch | +05:00 | +05:00 | |
| (UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi | India Standard Time | Asia/Kolkata | Asia/Kolkata | Match | +05:30 | +05:30 | |
| (UTC+05:30) Sri Jayawardenepura | Sri Lanka Standard Time | Asia/Colombo | Asia/Kolkata | Mismatch | +05:30 | +05:30 | |
| (UTC+05:45) Kathmandu | Nepal Standard Time | Asia/Katmandu | Asia/Kathmandu | Match | +05:45 | +05:45 | |
| (UTC+06:00) Astana | Central Asia Standard Time | Asia/Almaty | Asia/Omsk | Mismatch | +06:00 | +06:00 | |
| (UTC+06:00) Dhaka | Bangladesh Standard Time | Asia/Dhaka | Asia/Omsk | Mismatch | +06:00 | +06:00 | |
| (UTC+06:00) Novosibirsk (RTZ 5) | N. Central Asia Standard Time | Asia/Novosibirsk | Asia/Omsk | Acceptable | +06:00 | +06:00 | |
| (UTC+06:30) Yangon (Rangoon) | Myanmar Standard Time | Asia/Rangoon | Asia/Rangoon | Match | +06:30 | +06:30 | |
| (UTC+07:00) Krasnoyarsk (RTZ 6) | North Asia Standard Time | Asia/Krasnoyarsk | Asia/Krasnoyarsk | Match | +07:00 | +07:00 | |
| (UTC+07:00) Bangkok, Hanoi, Jakarta | SE Asia Standard Time | Asia/Bangkok | Asia/Krasnoyarsk | Mismatch | +07:00 | +07:00 | |
| (UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi | China Standard Time | Asia/Shanghai | Asia/Shanghai | Match | +08:00 | +08:00 | |
| (UTC+08:00) Irkutsk (RTZ 7) | North Asia East Standard Time | Asia/Irkutsk | Asia/Shanghai | Mismatch | +08:00 | +08:00 | |
| (UTC+08:00) Kuala Lumpur, Singapore | Singapore Standard Time | Asia/Singapore | Asia/Shanghai | Mismatch | +08:00 | +08:00 | |
| (UTC+08:00) Perth | W. Australia Standard Time | Australia/Perth | Asia/Shanghai | Mismatch | +08:00 | +08:00 | |
| (UTC+08:00) Taipei | Taipei Standard Time | Asia/Taipei | Asia/Shanghai | Mismatch | +08:00 | +08:00 | |
| (UTC+08:00) Ulaanbaatar | Ulaanbaatar Standard Time | Asia/Ulaanbaatar | Asia/Ulaanbaatar | Match | +08:00 | +09:00 | |
| (UTC+09:00) Yakutsk (RTZ 8) | Yakutsk Standard Time | Asia/Yakutsk | Asia/Yakutsk | Match | +09:00 | +09:00 | |
| (UTC+09:00) Osaka, Sapporo, Tokyo | Tokyo Standard Time | Asia/Tokyo | Asia/Yakutsk | Mismatch | +09:00 | +09:00 | |
| (UTC+09:00) Seoul | Korea Standard Time | Asia/Seoul | Asia/Yakutsk | Mismatch | +09:00 | +09:00 | |
| (UTC+09:30) Adelaide | Cen. Australia Standard Time | Australia/Adelaide | Australia/Adelaide | Match | +10:30 | +09:30 | |
| (UTC+09:30) Darwin | AUS Central Standard Time | Australia/Darwin | Australia/Darwin | Match | +09:30 | +09:30 | |
| (UTC+10:00) Brisbane | E. Australia Standard Time | Australia/Brisbane | Australia/Brisbane | Match | +10:00 | +10:00 | |
| (UTC+10:00) Guam, Port Moresby | West Pacific Standard Time | Pacific/Port_Moresby | Australia/Brisbane | Mismatch | +10:00 | +10:00 | |
| (UTC+10:00) Magadan | Magadan Standard Time | Asia/Magadan | Australia/Brisbane | Mismatch | +10:00 | +10:00 | |
| (UTC+10:00) Vladivostok, Magadan (RTZ 9) | Vladivostok Standard Time | Asia/Vladivostok | Australia/Brisbane | Mismatch | +10:00 | +10:00 | |
| (UTC+10:00) Canberra, Melbourne, Sydney | AUS Eastern Standard Time | Australia/Sydney | Australia/Sydney | Match | +11:00 | +10:00 | |
| (UTC+10:00) Hobart | Tasmania Standard Time | Australia/Hobart | Australia/Sydney | Mismatch | +11:00 | +10:00 | |
| (UTC+11:00) Solomon Is., New Caledonia | Central Pacific Standard Time | Pacific/Guadalcanal | Pacific/Noumea | Acceptable | +11:00 | +11:00 | |
| (UTC+11:00) Chokurdakh (RTZ 10) | Russia Time Zone 10 | Asia/Srednekolymsk | Pacific/Noumea | Mismatch | +11:00 | +11:00 | |
| (UTC+12:00) Coordinated Universal Time+12 | UTC+12 | Etc/GMT-12 | Pacific/Tarawa | Acceptable | +12:00 | +12:00 | |
| (UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky (RTZ 11) | Russia Time Zone 11 | Asia/Kamchatka | Pacific/Tarawa | Mismatch | +12:00 | +12:00 | |
| (UTC+12:00) Auckland, Wellington | New Zealand Standard Time | Pacific/Auckland | Pacific/Auckland | Match | +13:00 | +12:00 | |
| (UTC+12:00) Fiji | Fiji Standard Time | Pacific/Fiji | Pacific/Auckland | Mismatch | +13:00 | +12:00 | |
| (UTC+13:00) Nuku'alofa | Tonga Standard Time | Pacific/Tongatapu | Pacific/Tongatapu | Match | +13:00 | +13:00 | |
| (UTC+13:00) Samoa | Samoa Standard Time | Pacific/Apia | Pacific/Apia | Match | +14:00 | +13:00 | |
| (UTC+14:00) Kiritimati Island | Line Islands Standard Time | Pacific/Kiritimati | Pacific/Kiritimati | Match | +14:00 | +14:00 |
Created
September 29, 2015 22:55
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Testing moment-timezone guess feature
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@mj1856 I wanted to 'borrow' timezone settings from an ASP.NET server for my web browser extension so I've been doing this timezone mapping myself. Little did I know I was duplicating work already done. Tsk tsk.
Anyway, I am curious how you chose the 'Preferred Response' in this table.
Some examples:
Interestingly ASP.NET also has these: