Singapore taken from Mok Ly Yng (2003-10-30) https://web.archive.org/web/20190822231045/http://www.math.nus.edu.sg/~mathelmr/teaching/timezone.html Zone NAME STDOFF RULES FORMAT [UNTIL]
Asia/Singapore
Time zone identifier: Asia/Singapore
Current civil offset: +08:00 (+08)
Current DST state: Observing Standard Time
First standard time adoption: Adopted on 1900-12-31
Local Mean Time (LMT): +06:55:25 based on geographic meridian
Total recorded transitions: 8 transitions across 6 distinct offsets
Associated countries: AQ, MY, SG
Aliases (Link targets): Asia/Kuala_Lumpur, Singapore
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Historical Offset Step Chart (1880 to Present)
Text summary: Asia/Singapore shifted between 6 distinct offsets from 1900-12-31 through the modern era.
Complete Transition History (8 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1900-12-31T17:04:35Z | 1901-01-01 00:00:00 | +06:55:25 → +06:55:25 | SMT | No | offset-only |
1905-05-31T17:04:35Z | 1905-06-01 00:04:35 | +06:55:25 → +07:00 | +07 | No | gap |
1932-12-31T17:00:00Z | 1933-01-01 00:20:00 | +07:00 → +07:20 | +0720 | Yes | gap |
1935-12-31T16:40:00Z | 1936-01-01 00:00:00 | +07:20 → +07:20 | +0720 | No | offset-only |
1941-08-31T16:40:00Z | 1941-09-01 00:10:00 | +07:20 → +07:30 | +0730 | No | gap |
1942-02-15T16:30:00Z | 1942-02-16 01:30:00 | +07:30 → +09:00 | +09 | No | gap |
1945-09-11T15:00:00Z | 1945-09-11 22:30:00 | +09:00 → +07:30 | +0730 | No | overlap |
1981-12-31T16:00:00Z | 1982-01-01 00:00:00 | +07:30 → +08:00 | +08 | No | gap |
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.
asia(Lines 3849 to 3853)