Template:Daylight saving active
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Template documentation[view] [edit] [history] [purge]This template returns either 0 or 1 to indicate if daylight saving time (DST) is active in the given time zone region:
| 0 | DST is not active |
| 1 | DST is active |
See below for the currently supported time zones. Note that if DST is only partially observed in a certain time zone, this template returns 1 if DST is active in that part (even though it is not observed/active in the other part).
During DST, the clock is set one hour ahead of standard time.
Usage
{{Daylight saving in time zone | time zone abbreviation | date/time value}}
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| time zone abbreviation | 1 | Abbreviation of the time zone for which it is determined if DST is active. If no time zone is given or if the given time zone is not supported, then the output will default to 0.
| String | suggested |
| date/time value | 2 | Date and time for which it is determined if DST would be active in the given time zone. By default, if no value is given, it is determined if DST is active at the current time.
| Date | optional |
Supported time zones
From the list of time zone abbreviations, the following time zones are currently supported:
 Abbreviations 
|
Name |
|
Notes | ||
|---|---|---|---|---|---|
| HST | Hawaii Standard Time | UTC−10:00 | The *T, *ST and *DT variants of a particular time zone are considered the same region and will produce the same output, thus they can be used interchangeably.
DST is not observed in Hawaii and in Saskatchewan, Canada (except Lloydminster, SK, where MST/MDT is observed). | ||
| HAT or HAST | HADT | Hawaii-Aleutian Standard/Daylight Time | UTC−10:00 | UTC−09:00 | |
| AKT or AKST | AKDT | Alaska Standard/Daylight Time | UTC−09:00 | UTC−08:00 | |
| PT or PST | PDT | Pacific Standard/Daylight Time | UTC−08:00 | UTC−07:00 | |
| MT or MST | MDT | Mountain Standard/Daylight Time | UTC−07:00 | UTC−06:00 | |
| SKT or SKST | Saskatchewan Standard Time | UTC−06:00 | |||
| CT or CST | CDT | Central Standard/Daylight Time | UTC−06:00 | UTC−05:00 | |
| ET or EST | EDT | Eastern Standard/Daylight Time | UTC−05:00 | UTC−04:00 | |
| AT or AST | ADT | Atlantic Standard/Daylight Time | UTC−04:00 | UTC−03:00 | |
| NT or NST | NDT | Newfoundland Standard/Daylight Time | UTC−03:30 | UTC−02:30 | |
| GMT | BST | Greenwich Mean Time / British Summer Time |
UTC+00:00 | UTC+01:00 | Both the GMT and BST variants of this time zone are considered the same region and will produce the same output, thus they can be used interchangeably. |
| WET | WEST | Western European (Summer) Time | UTC+00:00 | UTC+01:00 | Both the *ET and *EST variants of a particular time zone are considered the same region and will produce the same output, thus they can be used interchangeably. |
| CET | CEST | Central European (Summer) Time | UTC+01:00 | UTC+02:00 | |
| EET | EEST | Eastern European (Summer) Time | UTC+02:00 | UTC+03:00 | |
| AWT or AWST | Australian Western Standard Time | UTC+08:00 | The *T, *ST and *DT variants of a particular time zone are considered the same region and will produce the same output, thus they can be used interchangeably.
DST is not observed in the AWT time zone. | ||
| ACT or ACST | ACDT | Australian Central Standard/Daylight Time | UTC+09:30 | UTC+10:30 | |
| AET or AEST | AEDT | Australian Eastern Standard/Daylight Time | UTC+10:00 | UTC+11:00 | |
| KST | Korea Standard Time | UTC+09:00 | DST is not observed in these time zones. | ||
| JST | Japan Standard Time | UTC+09:00 | |||
| NZT or NZST | NZDT | New Zealand Standard/Daylight Time | UTC+12:00 | UTC+13:00 | The NZT, NZST and NZDT variants of this time zone are considered the same region and will produce the same output, thus they can be used interchangeably. |
HAT, AKT, PT, MT, CT, ET, AT, NT
- DST begins on the second Sunday in March at 2 a.m. local standard time and ends on the first Sunday in November at 2 a.m. local daylight saving time ([1][2][3]).
- 2 a.m. HAST, AKST, PST, MST, CST, EST, AST and NST is 12:00, 11:00, 10:00, 9:00, 8:00, 7:00, 6:00 and 5:30 UTC respectively.
- 2 a.m. HADT, AKDT, PDT, MDT, CDT, EDT, ADT and NDT is 11:00, 10:00, 9:00, 8:00, 7:00, 6:00, 5:00 and 4:30 UTC respectively.
WET, CET, EET
- DST begins on the last Sunday in March at 1:00 UTC and ends on the last Sunday in October at 1:00 UTC ([4]).
ACT, AET
- DST begins on the first Sunday in October at 2 a.m. local standard time and ends on the first Sunday in April at 3 a.m. local daylight saving time ([5][6][7]).
- 2 a.m. ACST and AEST is 16:30 and 16:00 UTC (previous day) respectively, which is an offset of 7:30 hours and 8:00 hours respectively from midnight.
- 3 a.m. ACDT and AEDT is 2 a.m. ACST and AEST is 16:30 and 16:00 UTC (previous day) respectively, which is an offset of 7:30 hours and 8:00 hours respectively from midnight.
NZT
- DST begins on the last Sunday in September at 2 a.m. local standard time and ends on the first Sunday in April at 3 a.m. local daylight saving time ([8]).
- 2 a.m. NZST is 14:00 UTC (previous day), which is an offset of 10:00 hours from midnight.
- 3 a.m. NZDT is 2 a.m. NZST is 14:00 UTC (previous day), which is an offset of 10:00 hours from midnight.
Time zone map
Examples
(You may want to this page to update the output.)
*{{Daylight saving in time zone|CET}}
produces
- 0
*{{Daylight saving in time zone|CEST}}
produces
- 0
*{{Daylight saving in time zone|PT}}
produces
- 0
*{{Daylight saving in time zone|ACT}}
produces
- 1
*{{Daylight saving in time zone|NZT}}
produces
- 1
*{{Daylight saving in time zone|ET|10 March 2018 10:00 EST}}
produces
- 0
*{{Daylight saving in time zone|ET|11 March 2018 4:50 EST}}
produces
- 1
*{{Daylight saving in time zone|ET|11 March 2018 4:50}}
produces
- 0
Related templates
Current time
Current offset
Daylight savings
- {{Daylight saving active}} (0 when false, 1 when true)