![2017a](https://upload.wikimedia.org/wikipedia/commons/c/cb/2017a.png)
This is a list of time zones from release of the
tz database
The tz database is a collaborative compilation of information about the world's time zones, primarily intended for use with computer programs and operating systems. Paul Eggert is its current editor and maintainer, with the organizational backi ...
.
Legend
Type
* 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
Standard Time
Standard time is the synchronisation of clocks within a geographical region to a single time standard, rather than a local mean time standard. Generally, standard time agrees with the local mean time at some meridian that passes through the r ...
(STD) and
Daylight Saving Time
Daylight saving time (DST), also referred to as daylight savings time or simply daylight time (United States, Canada, and Australia), and summer time (United Kingdom, European Union, and others), is the practice of advancing clocks (typicall ...
(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 STD 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.
Time Zone abbreviations
Time 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.
List
See also
*
Tz database
The tz database is a collaborative compilation of information about the world's time zones, primarily intended for use with computer programs and operating systems. Paul Eggert is its current editor and maintainer, with the organizational backi ...
*
List of time zone abbreviations
__NOTOC__
This is a list of time zone abbreviations.
Time zones are often represented by alphabetic abbreviations such as "EST", "WST", and "CST", but these are not part of the international time and date standard ISO 8601#Time zone designators, ...
*
Abolition of time zones
The abolition of time zones involves replacing time zones with Coordinated Universal Time (UTC) as a local time.
History
For most of part of history, the position of the sun was used for timekeeping. During the 19th century, most towns kept t ...
Notes
References
Further reading
* For a complete and accurate history of each time zone, refer to the data and commentary in the TZ database itself.
{{UTC time offsets
*