Historically distinct IANA time zone
Pacific/Honolulu
- Countries
- United States of America
- GPS reference
- 21.31° N, 157.86° W
- Data source
- IANA northamerica
- Aliases
- HST, Pacific/Johnston, US/Hawaii
- Rule groups
- , US
United States of AmericaHawaii
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 21.31° N, 157.86° W. Associated countries: US.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
War
Peace
Original IANA source file: northamerica.
Civil-time record
Recorded changes over time
From 1896 to 1947 · 7 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- -10:30 · HSTStandard time applies
- -09:30 · HDTDaylight saving time begins
- -10:30 · HSTStandard time applies
- -09:30 · HWTDaylight saving time begins
- -09:30 · HPTDaylight saving time begins
- -10:30 · HSTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1896-01-13 12:01 | -10:30 | HST | Standard time |
| 1933-04-30 03:00 | -09:30 | HDT | Daylight saving time |
| 1933-05-21 11:00 | -10:30 | HST | Standard time |
| 1942-02-09 03:00 | -09:30 | HWT | Daylight saving time |
| 1945-08-14 13:30 | -09:30 | HPT | Daylight saving time |
| 1945-09-30 01:00 | -10:30 | HST | Standard time |
| 1947-06-08 02:30 | -10:00 | HST | Standard time |