This is a list of time zones from release 2024b of the tz database.[2]
Legend
editType
edit- Canonical - The primary, preferred zone name.
- Link - An alternative name (alias) which links to a canonical zone.
- Link†
- A standard Link (as above). The dagger symbol (†) signifies that the zone was canonical in a previous version of the database. Historical data for such zones is still preserved in the source code, but it is not included when compiling the database with standard options.
UTC offset
editStandard Time (SDT) and Daylight Saving Time (DST) offsets from UTC in hours and minutes.
For zones in which Daylight Saving is not observed, the DST offset shown in this table is a simple duplication of the SDT offset.
The UTC offsets are based on the current or upcoming database rules. This table does not attempt to document any of the historical data which resides in the database.
In Ireland, what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC.[3][4] The SDT column shows the offset from UTC during the winter, even in Ireland, where that's referred to as "winter time", and the DST column shows the offset from UTC during the summer, even in Ireland, where that's referred to as "standard time".
Time zone abbreviations
editTime zone abbreviations for both Standard Time and Daylight Saving Time are shown exactly as they appear in the database. See strftime and its "%Z" field.
Some of zone records use 3 or 4 letter abbreviations that are tied to physical time zones, others use numeric UTC offsets.
In Ireland, what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC.[3][4] The SDT column shows the abbreviation used during the winter, even in Ireland, and the DST column shows the abbreviation used during the summer, which is "IST", where the "S" in "IST" stands for "Standard", not "Summer".
List
edit| Region | Zones | Links | Total |
|---|---|---|---|
| Africa | 19 | 35 | 54 |
| America | 120 | 48 | 168 |
| Antarctica | 8 | 4 | 12 |
| Asia | 74 | 25 | 99 |
| Atlantic | 8 | 4 | 12 |
| Australia | 11 | 12 | 23 |
| Europe | 38 | 26 | 64 |
| Indian | 3 | 8 | 11 |
| Pacific | 30 | 14 | 44 |
| Etc | 28 | 7 | 35 |
| Other | 1 | 74 | 75 |
| Total | 340 | 257 | 597 |
| Source File |
Zones | Links | Total |
|---|---|---|---|
| factory | 1 | 0 | 1 |
| africa | 20 | 0 | 20 |
| antarctica | 6 | 0 | 6 |
| asia | 58 | 0 | 58 |
| australasia | 39 | 0 | 39 |
| etcetera | 28 | 1 | 29 |
| europe | 65 | 0 | 65 |
| northamerica | 78 | 0 | 78 |
| southamerica | 45 | 0 | 45 |
| backward | 0 | 256 | 256 |
| Total | 340 | 257 | 597 |
See also
editNotes
edit- ^ The Asia/Kashgar entry in the tz database reflected the use of Xinjiang Time by part of the local population. Consider using Asia/Shanghai for Beijing Time if that is preferred.
- ^ The Europe/Simferopol entry in the tz database includes the disputed 2014 transition from Ukraine Time to Moscow Time related to the Annexation of Crimea by the Russian Federation. Europe/Kyiv for Ukraine Time can be used instead.
References
edit- ^ Siroky, Evan (1 January 2024). "Time Zone Boundary Builder".
- ^ "Time Zone Database". IANA. 2017-02-28. Retrieved 2019-08-05.
- ^ a b "Standard Time Act, 1968". electronic Irish Statute Book (eISB).
- ^ a b "Standard Time (Amendment) Act, 1971". electronic Irish Statute Book (eISB).
- ^ "Time Zone & Clock Changes in Troll Station, Antarctica". www.timeanddate.com. Retrieved 2019-08-05.
Further reading
edit- For a complete and accurate history of each time zone, refer to the data and commentary in the TZ database itself.