Zone NAME STDOFF RULES FORMAT [UNTIL]
Pacific/Tongatapu
Time zone identifier: Pacific/Tongatapu
Current civil offset: +13:00 (+13)
Current DST state: Observing Standard Time
First standard time adoption: Adopted on 1945-09-09
Local Mean Time (LMT): +12:19:12 based on geographic meridian
Total recorded transitions: 10 transitions across 4 distinct offsets
Associated countries: TO
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Historical Offset Step Chart (1880 to Present)
Text summary: Pacific/Tongatapu shifted between 4 distinct offsets from 1945-09-09 through the modern era.
Complete Transition History (10 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1945-09-09T11:40:48Z | 1945-09-10 00:00:48 | +12:19:12 → +12:20 | +1220 | No | gap |
1960-12-31T11:40:00Z | 1961-01-01 00:40:00 | +12:20 → +13:00 | +13 | No | gap |
1999-10-06T13:00:00Z | 1999-10-07 03:00:00 | +13:00 → +14:00 | +14 | Yes | gap |
2000-03-18T13:00:00Z | 2000-03-19 02:00:00 | +14:00 → +13:00 | +13 | No | overlap |
2000-11-04T13:00:00Z | 2000-11-05 03:00:00 | +13:00 → +14:00 | +14 | Yes | gap |
2001-01-27T12:00:00Z | 2001-01-28 01:00:00 | +14:00 → +13:00 | +13 | No | overlap |
2001-11-03T13:00:00Z | 2001-11-04 03:00:00 | +13:00 → +14:00 | +14 | Yes | gap |
2002-01-26T12:00:00Z | 2002-01-27 01:00:00 | +14:00 → +13:00 | +13 | No | overlap |
2016-11-05T13:00:00Z | 2016-11-06 03:00:00 | +13:00 → +14:00 | +14 | Yes | gap |
2017-01-14T13:00:00Z | 2017-01-15 02:00:00 | +14:00 → +13:00 | +13 | No | overlap |
Notes from the Maintainers
Years on Record
Methodology Note: The 1970 Rule
tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.
australasia(Lines 840 to 840)