St Helena
Atlantic/St_Helena
Time zone identifier: Atlantic/St_Helena
Current civil offset: +00:00 (GMT)
Current DST state: Observing Standard Time
First standard time adoption: Adopted on 1890-01-01
Local Mean Time (LMT): -00:22:48 based on geographic meridian
Total recorded transitions: 2 transitions across 2 distinct offsets
Associated countries: SH
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Historical Offset Step Chart (1880 to Present)
Text summary: Atlantic/St_Helena shifted between 2 distinct offsets from 1890-01-01 through the modern era.
Complete Transition History (2 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1890-01-01T00:22:48Z | 1890-01-01 00:00:00 | -00:22:48 → -00:22:48 | JMT | No | offset-only |
1951-01-01T00:22:48Z | 1951-01-01 00:22:48 | -00:22:48 → +00:00 | GMT | 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.
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