Epoch Converter
Time zone list / Epoch to time zone converter
There is only one Unix time and it is created by using the UTC/GMT time zone. This means you might have convert time zones to calculate timestamps. Most programming languages have libraries to help you converting time zones, calculating by hand might not be a good idea because of the variety of time zones en daylight saving times. But here's a list of time zones and offset in seconds.
Convert epoch to other time zone
Conversion results (1640222099)
1640222099 converts to Wednesday December 22, 2021 19:14:59 (pm) in time zone America/Chicago (CST)The offset (difference to Greenwich Time/GMT) is -06:00 or in seconds -21600.
Other time zones
The 'Converted timestamp' column shows the time for Unix timestamp 1640222099 (Dec 23 2021 01:14:59 UTC/GMT).
| Region (time zone) | Converted timestamp 1640222099 |
Relative to UTC/ |
Date in DST |
Offset In seconds |
|---|---|---|---|---|
| Africa | ||||
| Africa/Abidjan (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Accra (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Addis Ababa (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Algiers (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Asmara (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Bamako (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Bangui (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Banjul (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Bissau (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Blantyre (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Brazzaville (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Bujumbura (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Cairo (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Casablanca (+01) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Ceuta (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Conakry (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Dakar (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Dar es Salaam (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Djibouti (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Douala (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/El Aaiun (+01) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Freetown (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Gaborone (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Harare (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Johannesburg (SAST) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Juba (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Kampala (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Khartoum (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Kigali (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Kinshasa (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Lagos (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Libreville (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Lome (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Luanda (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Lubumbashi (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Lusaka (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Malabo (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Maputo (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Maseru (SAST) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Mbabane (SAST) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Mogadishu (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Monrovia (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Nairobi (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Africa/Ndjamena (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Niamey (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Nouakchott (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Ouagadougou (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Porto-Novo (WAT) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Sao Tome (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Africa/Tripoli (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Africa/Tunis (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Africa/Windhoek (CAT) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| America | ||||
| America/Adak (HST) | Dec 22 2021 15:14:59 | GMT -10:00 | -36000 | |
| America/Anchorage (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/Anguilla (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Antigua (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Araguaina (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Buenos Aires (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Catamarca (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Cordoba (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Jujuy (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/La Rioja (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Mendoza (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Rio Gallegos (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Salta (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/San Juan (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/San Luis (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Tucuman (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Argentina/Ushuaia (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Aruba (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Asuncion (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | DST | -10800 |
| America/Atikokan (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Bahia (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Bahia Banderas (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Barbados (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Belem (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Belize (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Blanc-Sablon (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Boa Vista (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Bogota (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Boise (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Cambridge Bay (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Campo Grande (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Cancun (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Caracas (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Cayenne (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Cayman (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Chicago (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Chihuahua (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Costa Rica (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Creston (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Cuiaba (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Curacao (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Danmarkshavn (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| America/Dawson (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Dawson Creek (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Denver (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Detroit (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Dominica (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Edmonton (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Eirunepe (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/El Salvador (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Fort Nelson (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Fortaleza (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Glace Bay (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Goose Bay (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Grand Turk (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Grenada (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Guadeloupe (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Guatemala (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Guayaquil (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Guyana (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Halifax (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Havana (CST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Hermosillo (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Indiana/Indianapolis (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Indiana/Knox (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Indiana/Marengo (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Indiana/Petersburg (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Indiana/Tell City (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Indiana/Vevay (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Indiana/Vincennes (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Indiana/Winamac (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Inuvik (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Iqaluit (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Jamaica (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Juneau (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/Kentucky/Louisville (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Kentucky/Monticello (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Kralendijk (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/La Paz (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Lima (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Los Angeles (PST) | Dec 22 2021 17:14:59 | GMT -08:00 | -28800 | |
| America/Lower Princes (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Maceio (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Managua (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Manaus (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Marigot (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Martinique (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Matamoros (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Mazatlan (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Menominee (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Merida (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Metlakatla (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/Mexico City (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Miquelon (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Moncton (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Monterrey (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Montevideo (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Montserrat (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Nassau (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/New York (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Nipigon (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Nome (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/Noronha (-02) | Dec 22 2021 23:14:59 | GMT -02:00 | -7200 | |
| America/North Dakota/Beulah (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/North Dakota/Center (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/North Dakota/New Salem (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Nuuk (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Ojinaga (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Panama (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Pangnirtung (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Paramaribo (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Phoenix (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Port-au-Prince (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Port of Spain (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Porto Velho (-04) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Puerto Rico (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Punta Arenas (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Rainy River (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Rankin Inlet (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Recife (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Regina (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Resolute (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Rio Branco (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Santarem (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Santiago (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | DST | -10800 |
| America/Santo Domingo (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Sao Paulo (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| America/Scoresbysund (-01) | Dec 23 2021 00:14:59 | GMT -01:00 | -3600 | |
| America/Sitka (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/St Barthelemy (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/St Johns (NST) | Dec 22 2021 21:44:59 | GMT -03:30 | -12600 | |
| America/St Kitts (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/St Lucia (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/St Thomas (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/St Vincent (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Swift Current (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Tegucigalpa (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Thule (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Thunder Bay (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Tijuana (PST) | Dec 22 2021 17:14:59 | GMT -08:00 | -28800 | |
| America/Toronto (EST) | Dec 22 2021 20:14:59 | GMT -05:00 | -18000 | |
| America/Tortola (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| America/Vancouver (PST) | Dec 22 2021 17:14:59 | GMT -08:00 | -28800 | |
| America/Whitehorse (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| America/Winnipeg (CST) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| America/Yakutat (AKST) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| America/Yellowknife (MST) | Dec 22 2021 18:14:59 | GMT -07:00 | -25200 | |
| Antarctica | ||||
| Antarctica/Casey (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Antarctica/Davis (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Antarctica/DumontDUrville (+10) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Antarctica/Macquarie (AEDT) | Dec 23 2021 12:14:59 | GMT +11:00 | DST | +39600 |
| Antarctica/Mawson (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Antarctica/McMurdo (NZDT) | Dec 23 2021 14:14:59 | GMT +13:00 | DST | +46800 |
| Antarctica/Palmer (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| Antarctica/Rothera (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| Antarctica/Syowa (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Antarctica/Troll (+00) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Antarctica/Vostok (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Arctic | ||||
| Arctic/Longyearbyen (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Asia | ||||
| Asia/Aden (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Almaty (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Amman (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Anadyr (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Asia/Aqtau (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Aqtobe (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Ashgabat (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Atyrau (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Baghdad (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Bahrain (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Baku (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Asia/Bangkok (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Barnaul (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Beirut (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Bishkek (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Brunei (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Chita (+09) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Choibalsan (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Colombo (+0530) | Dec 23 2021 06:44:59 | GMT +05:30 | +19800 | |
| Asia/Damascus (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Dhaka (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Dili (+09) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Dubai (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Asia/Dushanbe (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Famagusta (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Gaza (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Hebron (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Ho Chi Minh (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Hong Kong (HKT) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Hovd (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Irkutsk (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Jakarta (WIB) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Jayapura (WIT) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Jerusalem (IST) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Kabul (+0430) | Dec 23 2021 05:44:59 | GMT +04:30 | +16200 | |
| Asia/Kamchatka (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Asia/Karachi (PKT) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Kathmandu (+0545) | Dec 23 2021 06:59:59 | GMT +05:45 | +20700 | |
| Asia/Khandyga (+09) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Kolkata (IST) | Dec 23 2021 06:44:59 | GMT +05:30 | +19800 | |
| Asia/Krasnoyarsk (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Kuala Lumpur (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Kuching (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Kuwait (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Macau (CST) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Magadan (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Asia/Makassar (WITA) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Manila (PST) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Muscat (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Asia/Nicosia (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Asia/Novokuznetsk (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Novosibirsk (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Omsk (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Oral (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Phnom Penh (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Pontianak (WIB) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Pyongyang (KST) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Qatar (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Qostanay (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Qyzylorda (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Riyadh (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Asia/Sakhalin (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Asia/Samarkand (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Seoul (KST) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Shanghai (CST) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Singapore (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Srednekolymsk (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Asia/Taipei (CST) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Tashkent (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Tbilisi (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Asia/Tehran (+0330) | Dec 23 2021 04:44:59 | GMT +03:30 | +12600 | |
| Asia/Thimphu (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Tokyo (JST) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Tomsk (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Ulaanbaatar (+08) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Asia/Urumqi (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Asia/Ust-Nera (+10) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Asia/Vientiane (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Asia/Vladivostok (+10) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Asia/Yakutsk (+09) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Asia/Yangon (+0630) | Dec 23 2021 07:44:59 | GMT +06:30 | +23400 | |
| Asia/Yekaterinburg (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Asia/Yerevan (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Atlantic | ||||
| Atlantic/Azores (-01) | Dec 23 2021 00:14:59 | GMT -01:00 | -3600 | |
| Atlantic/Bermuda (AST) | Dec 22 2021 21:14:59 | GMT -04:00 | -14400 | |
| Atlantic/Canary (WET) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Atlantic/Cape Verde (-01) | Dec 23 2021 00:14:59 | GMT -01:00 | -3600 | |
| Atlantic/Faroe (WET) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Atlantic/Madeira (WET) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Atlantic/Reykjavik (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Atlantic/South Georgia (-02) | Dec 22 2021 23:14:59 | GMT -02:00 | -7200 | |
| Atlantic/St Helena (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Atlantic/Stanley (-03) | Dec 22 2021 22:14:59 | GMT -03:00 | -10800 | |
| Australia | ||||
| Australia/Adelaide (ACDT) | Dec 23 2021 11:44:59 | GMT +10:30 | DST | +37800 |
| Australia/Brisbane (AEST) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Australia/Broken Hill (ACDT) | Dec 23 2021 11:44:59 | GMT +10:30 | DST | +37800 |
| Australia/Darwin (ACST) | Dec 23 2021 10:44:59 | GMT +09:30 | +34200 | |
| Australia/Eucla (+0845) | Dec 23 2021 09:59:59 | GMT +08:45 | +31500 | |
| Australia/Hobart (AEDT) | Dec 23 2021 12:14:59 | GMT +11:00 | DST | +39600 |
| Australia/Lindeman (AEST) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Australia/Lord Howe (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | DST | +39600 |
| Australia/Melbourne (AEDT) | Dec 23 2021 12:14:59 | GMT +11:00 | DST | +39600 |
| Australia/Perth (AWST) | Dec 23 2021 09:14:59 | GMT +08:00 | +28800 | |
| Australia/Sydney (AEDT) | Dec 23 2021 12:14:59 | GMT +11:00 | DST | +39600 |
| Europe | ||||
| Europe/Amsterdam (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Andorra (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Astrakhan (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Europe/Athens (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Belgrade (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Berlin (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Bratislava (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Brussels (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Bucharest (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Budapest (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Busingen (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Chisinau (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Copenhagen (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Dublin (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | DST | 0 |
| Europe/Gibraltar (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Guernsey (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Europe/Helsinki (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Isle of Man (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Europe/Istanbul (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Jersey (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Europe/Kaliningrad (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Kirov (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Kyiv (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Lisbon (WET) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Europe/Ljubljana (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/London (GMT) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
| Europe/Luxembourg (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Madrid (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Malta (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Mariehamn (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Minsk (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Monaco (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Moscow (MSK) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Oslo (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Paris (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Podgorica (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Prague (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Riga (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Rome (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Samara (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Europe/San Marino (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Sarajevo (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Saratov (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Europe/Simferopol (MSK) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Skopje (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Sofia (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Stockholm (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Tallinn (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Tirane (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Ulyanovsk (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Europe/Uzhgorod (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Vaduz (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Vatican (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Vienna (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Vilnius (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Volgograd (+03) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Europe/Warsaw (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Zagreb (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Europe/Zaporozhye (EET) | Dec 23 2021 03:14:59 | GMT +02:00 | +7200 | |
| Europe/Zurich (CET) | Dec 23 2021 02:14:59 | GMT +01:00 | +3600 | |
| Indian | ||||
| Indian/Antananarivo (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Indian/Chagos (+06) | Dec 23 2021 07:14:59 | GMT +06:00 | +21600 | |
| Indian/Christmas (+07) | Dec 23 2021 08:14:59 | GMT +07:00 | +25200 | |
| Indian/Cocos (+0630) | Dec 23 2021 07:44:59 | GMT +06:30 | +23400 | |
| Indian/Comoro (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Indian/Kerguelen (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Indian/Mahe (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Indian/Maldives (+05) | Dec 23 2021 06:14:59 | GMT +05:00 | +18000 | |
| Indian/Mauritius (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Indian/Mayotte (EAT) | Dec 23 2021 04:14:59 | GMT +03:00 | +10800 | |
| Indian/Reunion (+04) | Dec 23 2021 05:14:59 | GMT +04:00 | +14400 | |
| Pacific | ||||
| Pacific/Apia (+13) | Dec 23 2021 14:14:59 | GMT +13:00 | +46800 | |
| Pacific/Auckland (NZDT) | Dec 23 2021 14:14:59 | GMT +13:00 | DST | +46800 |
| Pacific/Bougainville (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Chatham (+1345) | Dec 23 2021 14:59:59 | GMT +13:45 | DST | +49500 |
| Pacific/Chuuk (+10) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Pacific/Easter (-05) | Dec 22 2021 20:14:59 | GMT -05:00 | DST | -18000 |
| Pacific/Efate (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Fakaofo (+13) | Dec 23 2021 14:14:59 | GMT +13:00 | +46800 | |
| Pacific/Fiji (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Funafuti (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Galapagos (-06) | Dec 22 2021 19:14:59 | GMT -06:00 | -21600 | |
| Pacific/Gambier (-09) | Dec 22 2021 16:14:59 | GMT -09:00 | -32400 | |
| Pacific/Guadalcanal (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Guam (ChST) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Pacific/Honolulu (HST) | Dec 22 2021 15:14:59 | GMT -10:00 | -36000 | |
| Pacific/Kanton (+13) | Dec 23 2021 14:14:59 | GMT +13:00 | +46800 | |
| Pacific/Kiritimati (+14) | Dec 23 2021 15:14:59 | GMT +14:00 | +50400 | |
| Pacific/Kosrae (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Kwajalein (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Majuro (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Marquesas (-0930) | Dec 22 2021 15:44:59 | GMT -09:30 | -34200 | |
| Pacific/Midway (SST) | Dec 22 2021 14:14:59 | GMT -11:00 | -39600 | |
| Pacific/Nauru (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Niue (-11) | Dec 22 2021 14:14:59 | GMT -11:00 | -39600 | |
| Pacific/Norfolk (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | DST | +43200 |
| Pacific/Noumea (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Pago Pago (SST) | Dec 22 2021 14:14:59 | GMT -11:00 | -39600 | |
| Pacific/Palau (+09) | Dec 23 2021 10:14:59 | GMT +09:00 | +32400 | |
| Pacific/Pitcairn (-08) | Dec 22 2021 17:14:59 | GMT -08:00 | -28800 | |
| Pacific/Pohnpei (+11) | Dec 23 2021 12:14:59 | GMT +11:00 | +39600 | |
| Pacific/Port Moresby (+10) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Pacific/Rarotonga (-10) | Dec 22 2021 15:14:59 | GMT -10:00 | -36000 | |
| Pacific/Saipan (ChST) | Dec 23 2021 11:14:59 | GMT +10:00 | +36000 | |
| Pacific/Tahiti (-10) | Dec 22 2021 15:14:59 | GMT -10:00 | -36000 | |
| Pacific/Tarawa (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Tongatapu (+13) | Dec 23 2021 14:14:59 | GMT +13:00 | +46800 | |
| Pacific/Wake (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| Pacific/Wallis (+12) | Dec 23 2021 13:14:59 | GMT +12:00 | +43200 | |
| UTC (GMT) | ||||
| UTC (UTC) | Dec 23 2021 01:14:59 | GMT +00:00 | 0 | |
Be careful: This script cannot handle dates far in the future/past! Current timezones/daylight saving rules are used for all dates.
Daylight Saving Times (DST)
To convert from normal/standard time to daylight saving time add 1 hour ( or +3600 seconds ).
For example: Eastern Standard Time = GMT-5, add 1 hour: Eastern Daylight Time = GMT-4