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 | +05:30 | Asia/Calcutta | Asia | Calcutta | - |
| 2 | +05:30 | Asia/Colombo | Asia | Colombo | - |
| 3 | +05:30 | Asia/Kolkata | Asia | Kolkata | - |
| 4 | +05:30 | ical4j~6a8c808d-8906-49e1-9a0d-e888f27b579c | ical4j~6a8c808d-8906-49e1-9a0d-e888f27b579c | - | |
| 5 | +05:30 | ical4j~78b84833-1004-43d2-8f51-5f240e824d5e | ical4j~78b84833-1004-43d2-8f51-5f240e824d5e | - | |
| 6 | +05:30 | ical4j~897486aa-f19e-4f09-80bc-c47192b54ca3 | ical4j~897486aa-f19e-4f09-80bc-c47192b54ca3 | - | |
| 7 | +05:30 | ical4j~8b880def-e67c-4292-8372-cb8c40cb89a2 | ical4j~8b880def-e67c-4292-8372-cb8c40cb89a2 | - | |
| 8 | +05:30 | ical4j~d71e3880-84b2-48fd-b6ba-d770d301527c | ical4j~d71e3880-84b2-48fd-b6ba-d770d301527c | - | |
| 9 | +05:30 | ical4j~f9d747a9-a652-4edc-89e1-1230e7e4a43c | ical4j~f9d747a9-a652-4edc-89e1-1230e7e4a43c | - |
| # | 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 | - |