Needed to select time zone with a reconizable region for each unique offset
- Daylight savings time means that unique names will shift, changing the names
- There are actually ~38 unique timezones depending on daylight savings time.
- London which is known for GMT actually observers daylight savings time.
| # | Offset | Time Zone | Region | City | Skips DST |
|---|---|---|---|---|---|
| 1 | +00:00 | Africa/Abidjan | Africa | Abidjan | - |
| 2 | +00:00 | Africa/Accra | Africa | Accra | - |
| 3 | +00:00 | Africa/Bamako | Africa | Bamako | - |
| 4 | +00:00 | Africa/Banjul | Africa | Banjul | - |
| 5 | +00:00 | Africa/Bissau | Africa | Bissau | - |
| 6 | +00:00 | Africa/Conakry | Africa | Conakry | - |
| 7 | +00:00 | Africa/Dakar | Africa | Dakar | - |
| 8 | +00:00 | Africa/Freetown | Africa | Freetown | - |
| 9 | +00:00 | Africa/Lome | Africa | Lome | - |
| 10 | +00:00 | Africa/Monrovia | Africa | Monrovia | - |
| 11 | +00:00 | Africa/Nouakchott | Africa | Nouakchott | - |
| 12 | +00:00 | Africa/Ouagadougou | Africa | Ouagadougou | - |
| 13 | +00:00 | Africa/Sao_Tome | Africa | Sao Tome | - |
| 14 | +00:00 | Africa/Timbuktu | Africa | Timbuktu | - |
| 15 | +00:00 | America/Danmarkshavn | America | Danmarkshavn | - |
| 16 | +00:00 | Atlantic/Azores | Atlantic | Azores | - |
| 17 | +00:00 | Atlantic/Reykjavik | Atlantic | Reykjavik | - |
| 18 | +00:00 | Atlantic/St_Helena | Atlantic | St Helena | - |
| 19 | +00:00 | Etc/GMT | Etc | GMT | Yes |
| 20 | +00:00 | Etc/GMT+0 | Etc | GMT+0 | Yes |
| 21 | +00:00 | Etc/GMT-0 | Etc | GMT-0 | Yes |
| 22 | +00:00 | Etc/GMT0 | Etc | GMT0 | Yes |
| 23 | +00:00 | Etc/Greenwich | Etc | Greenwich | Yes |
| 24 | +00:00 | Etc/UCT | Etc | UCT | Yes |
| 25 | +00:00 | Etc/UTC | Etc | UTC | Yes |
| 26 | +00:00 | Etc/Universal | Etc | Universal | Yes |
| 27 | +00:00 | Etc/Zulu | Etc | Zulu | Yes |
| 28 | +00:00 | GMT | GMT | Yes | |
| 29 | +00:00 | GMT0 | GMT0 | Yes | |
| 30 | +00:00 | Greenwich | Greenwich | Yes | |
| 31 | +00:00 | Iceland | Iceland | - | |
| 32 | +00:00 | UCT | UCT | Yes | |
| 33 | +00:00 | UTC | UTC | Yes | |
| 34 | +00:00 | Universal | Universal | Yes | |
| 35 | +00:00 | Zulu | Zulu | Yes | |
| 36 | +00:00 | ical4j~0828e1a9-a309-4e3f-afb9-4939c02e0f0e | ical4j~0828e1a9-a309-4e3f-afb9-4939c02e0f0e | - | |
| 37 | +00:00 | ical4j~206ede6c-a299-46d5-9581-6c2f57f4ca74 | ical4j~206ede6c-a299-46d5-9581-6c2f57f4ca74 | Yes | |
| 38 | +00:00 | ical4j~349bce62-d116-4459-9225-ff0f85c96c44 | ical4j~349bce62-d116-4459-9225-ff0f85c96c44 | Yes | |
| 39 | +00:00 | ical4j~5ee98437-a203-42c8-8442-83f777ebc786 | ical4j~5ee98437-a203-42c8-8442-83f777ebc786 | Yes | |
| 40 | +00:00 | ical4j~8209f2c9-9122-4d88-bc40-1244e5812edd | ical4j~8209f2c9-9122-4d88-bc40-1244e5812edd | Yes | |
| 41 | +00:00 | ical4j~8360277f-4da8-4335-8e71-87165b56b61a | ical4j~8360277f-4da8-4335-8e71-87165b56b61a | - | |
| 42 | +00:00 | ical4j~8d1caaa3-46aa-4822-aacc-e4e6fa6efa59 | ical4j~8d1caaa3-46aa-4822-aacc-e4e6fa6efa59 | - | |
| 43 | +00:00 | ical4j~abd3abff-6622-4047-b919-289a5e0e9982 | ical4j~abd3abff-6622-4047-b919-289a5e0e9982 | - |
| # | Offset | Time Zone | Region | City | Skips DST |
|---|---|---|---|---|---|
| 1 | -11:00 | Pacific/Pago_Pago | Pacific | Pago Pago | - |
| 2 | -10:00 | Pacific/Honolulu | Pacific | Honolulu | - |
| 3 | -09:30 | Pacific/Marquesas | Pacific | Marquesas | - |
| 4 | -09:00 | America/Adak | America | Adak | - |
| 5 | -08:00 | America/Anchorage | America | Anchorage | - |
| 6 | -07:00 | America/Los_Angeles | America | Los Angeles | - |
| 7 | -06:00 | America/Denver | America | Denver | - |
| 8 | -05:00 | America/Chicago | America | Chicago | - |
| 9 | -04:00 | America/New_York | America | New York | - |
| 10 | -03:00 | America/Halifax | America | Halifax | - |
| 11 | -02:30 | America/St_Johns | America | St Johns | - |
| 12 | -02:00 | Atlantic/South_Georgia | Atlantic | South Georgia | - |
| 13 | -01:00 | Atlantic/Cape_Verde | Atlantic | Cape Verde | - |
| 14 | +00:00 | Greenwich | Greenwich | Yes | |
| 15 | +01:00 | Europe/London | Europe | London | - |
| 16 | +02:00 | Europe/Gibraltar | Europe | Gibraltar | - |
| 17 | +03:00 | Europe/Moscow | Europe | Moscow | - |
| 18 | +03:30 | Asia/Tehran | Asia | Tehran | - |
| 19 | +04:00 | Asia/Dubai | Asia | Dubai | - |
| 20 | +04:30 | Asia/Kabul | Asia | Kabul | - |
| 21 | +05:00 | Asia/Karachi | Asia | Karachi | - |
| 22 | +05:30 | Asia/Kolkata | Asia | Kolkata | - |
| 23 | +05:45 | Asia/Kathmandu | Asia | Kathmandu | - |
| 24 | +06:00 | Asia/Dhaka | Asia | Dhaka | - |
| 25 | +07:00 | Asia/Bangkok | Asia | Bangkok | - |
| 26 | +08:00 | Australia/Perth | Australia | Perth | - |
| 27 | +09:00 | Asia/Tokyo | Asia | Tokyo | - |
| 28 | +09:30 | Australia/Darwin | Australia | Darwin | - |
| 29 | +10:00 | Australia/Sydney | Australia | Sydney | - |
| 30 | +10:30 | Australia/Lord_Howe | Australia | Lord Howe | - |
| 31 | +11:00 | Pacific/Guadalcanal | Pacific | Guadalcanal | - |
| 32 | +12:00 | Pacific/Auckland | Pacific | Auckland | - |
| 33 | +12:45 | Pacific/Chatham | Pacific | Chatham | - |