Antigua and Barbuda
America/Antigua
Time zone identifier: America/Antigua
Current civil offset: -04:00 (AST)
Current DST state: Observing Standard Time
First standard time adoption: Adopted on 1912-03-02
Local Mean Time (LMT): -04:07:12 based on geographic meridian
Total recorded transitions: 2 transitions across 3 distinct offsets
Associated countries: AG
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Historical Offset Step Chart (1880 to Present)
Text summary: America/Antigua shifted between 3 distinct offsets from 1912-03-02 through the modern era.
Complete Transition History (2 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1912-03-02T04:07:12Z | 1912-03-01 23:07:12 | -04:07:12 → -05:00 | EST | No | overlap |
1951-01-01T05:00:00Z | 1951-01-01 01:00:00 | -05:00 → -04:00 | AST | 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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