Solutions
Time zones used by e.g. LeadPages
| Timezone | DST | Begins: | Ends: | Zonecode |
| -12:00, International Date Line West | No | 1 | ||
| -11:00, Coordinated Universial Time | No | 2 | ||
| -10:00, Hawaii | No | 3 | ||
| -09:00, Alaska | Yes | 8. mar | 1. nov | 4 |
| -08:00, Baja California | Yes | 5. apr | 25. okt | 5 |
| -08:00, Pacific Time (US & Canada) | Yes | 8. mar | 1. nov | 6 |
| -07:00, Arizona | No | 7 | ||
| -07:00, Chihuahua, La Paz, Mazatlan | Yes | 5. apr | 25. okt | 8 |
| -07:00, Mountain Time US & Canada | Yes | 8. mar | 1. nov | 9 |
| -06:00, Central America | No | 10 | ||
| -06:00, Central Time US & Canada | Yes | 8. mar | 1. nov | 11 |
| -06:00, Guadalajara, Mexico City, Monterrey | Yes | 5. apr | 25. okt | 12 |
| -06:00, Saskatchewan | No | 13 | ||
| -05:00, Bogota, Lima, Quito | No | 14 | ||
| -05:00, Eastern time US & Canada | Yes | 8. mar | 1. nov | 15 |
| -05:00, Indiana (East) | Yes | 8. mar | 1. nov | 16 |
| -04:30, Caracas | No | 17 | ||
| -04:00, Asuncion | Yes | 4. okt | 12. apr | 18 |
| -04:00, Atlancic Time (Canada) | Yes | 8. mar | 1. nov | 19 |
| -04:00, Cuiaba | Yes | 18. okt | 22. feb | 20 |
| -04:00, Georgetown, La Paz, Manaus, San Juan | No | 21 | ||
| -04:00, Santiago | Yes | 11. okt | 8. mar | 22 |
| -03:30, Newfoundland | Yes | 8. mar | 1. nov | 23 |
| -03:00, Brasilia | Yes | 18. okt | 22. feb | 24 |
| -03:00, Buenos Aires | No | 25 | ||
| -03:00, Cayenne, Fortaleza | No | 26 | ||
| -03:00, Greenland | Yes | 21. mar | 31. okt | 27 |
| -03:00, Montevideo | Yes | 4. okt | 8. mar | 28 |
| -03:00, Salvador | Yes | 18. okt | 22. feb | 29 |
| -02:00, Coordinated Universal Time-02 | No | 30 | ||
| -02:00, Mid-Atlantic | Yes | 29. mar | 27. sep | 31 |
| -01:00, Azores | Yes | 29. mar | 25. okt | 32 |
| -01:00, Cape Verde Is. | No | 33 | ||
| 00:00, Casablanca | No | 34 | ||
| 00:00, Coordinated Universal Time | No | 35 | ||
| 00:00, Dublin, Edinburgh, Lisbon, London | Yes | 29. mar | 25. okt | 36 |
| 00:00, Monrovia, Reykjavik | No | 37 | ||
| +01:00, Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna | Yes | 29. mar | 25. okt | 38 |
| +01:00, Belgrade, Bratislava, Budapest, Ljubljana, Prague | Yes | 29. mar | 25. okt | 39 |
| +01:00, Brussels, Copenhagen, Madrid, Paris | Yes | 29. mar | 25. okt | 40 |
| +01:00, Sarajevo, Skopje, Warsaw, Zagreb | Yes | 29. mar | 25. okt | 41 |
| +01:00, West Central Africa | No | 42 | ||
| +01:00, Windhoek | Yes | 6. sep | 5. apr | 43 |
| +02:00, Amman | Yes | 27. mar | 30. okt | 44 |
| +02:00, Athens, Bucharest | Yes | 29. mar | 25. okt | 45 |
| +02:00, Beirut | Yes | 29. mar | 25. okt | 46 |
| +02:00, Cairo | No | 47 | ||
| +02:00, Damascus | Yes | 27. mar | 30. okt | 48 |
| +02:00, Harare, Pretoria | No | 49 | ||
| +02:00, Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius | Yes | 29. mar | 25. okt | 50 |
| +02:00, Istanbul | Yes | 29. mar | 25. okt | 51 |
| +02:00, Jerusalem | Yes | 27. mar | 20. sep | 52 |
| +02:00, Nicosia | Yes | 29. mar | 25. sep | 53 |
| +03:00, Baghdad | No | 54 | ||
| +03:00, Kaliningrad, Minsk | No | 55 | ||
| +03:00, Kuwait, Riyadh | No | 56 | ||
| +03:00, Nairobi | No | 57 | ||
| +03:30, Tehran | Yes | 15. mar | 15. sep | 58 |
| +04:00, Abu Dhabi, Muscat | No | 59 | ||
| +04:00, Baku | Yes | 29. mar | 25. okt | 60 |
| +04:00, Moscow, St. Petersburg, Volgograd | Yes | 29. mar | 25. okt | 61 |
| +04:00, Port Louis | Yes | 29. mar | 25. okt | 62 |
| +04:00, Tbilisi | Yes | 29. mar | 25. okt | 63 |
| +04:00, Yerevan | Yes | 29. mar | 25. okt | 64 |
| +04:30, Kabul | No | 65 | ||
| +05:00, Islamabad, Karachi | No | 66 | ||
| +05:00, Tashkent | No | 67 | ||
| +05:30, Chennai, Kolkata, Mumbai, New Dehli | No | 68 | ||
| +05:30, Sri Jayawardenepura | No | 69 | ||
| +05:45, Kathmandu | No | 70 | ||
| +06:00, Astana | No | 71 | ||
| +06:00, Dhaka | No | 72 | ||
| +06:00, Ekaterinburg | No | 73 | ||
| +06:30, Yangon (Rangoon) | No | 74 | ||
| +07:00, Bangkok, Hanoi, Jakarta | No | 75 | ||
| +07:00, Novosibirsk | No | 76 | ||
| +08:00, Beijing, Chongqing, Hong Kong, Urumqi | No | 77 | ||
| +08:00, Krasnoyarsk | No | 78 | ||
| +08:00, Kaula Lumpur, Singapore | No | 79 | ||
| +08:00, Perth | No | 80 | ||
| +08:00, Taipei | No | 81 | ||
| +08:00, Ulaanbaatar | No | 82 | ||
| +09:00, Irkutsk | No | 83 | ||
| +09:00, Osaka, Sapporo, Tokyo | No | 84 | ||
| +09:00, Seoul | No | 85 | ||
| +09:30, Adelaide | Yes | 4. okt | 5. apr | 86 |
| +09:30, Darwin | No | 87 | ||
| +10:00, Brisbane | No | 88 | ||
| +10:00, Canberra, Melbourne, Sydney | Yes | 4. okt | 5. apr | 89 |
| +10:00, Guam, Port Moresby | No | 90 | ||
| +10:00, Hobart | Yes | 4. okt | 5. apr | 91 |
| +10:00, Yakutsk | No | 92 | ||
| +11:00, Solomon Is., New Caledonia | No | 93 | ||
| +11:00, Vladvistok | No | 94 | ||
| +12:00, Auckland, Wellington | Yes | 27. sep | 5. apr | 95 |
| +12:00, Coordinated Universal Time +12 | No | 96 | ||
| +12:00, Fiji | Yes | 25. okt | 20. jan | 97 |
| +12:00, Magadan | No | 98 | ||
| +13:00, Naku'alofa | No | 99 | ||
| +13:00, Samoa | Yes | 27. sep | 5. apr | 100 |