Hawaii–Aleutian Time Zone
The Hawaii–Aleutian Time Zone uses HST (UTC−10) in winter and HDT (UTC−9) from the second Sunday in March to the first Sunday in November. Hawaii stays on HST (UTC−10) all year. The western Aleutian Islands use the same zone but do change to HDT (UTC−9) in summer.
| Abbreviations | HST / HDT |
|---|---|
| UTC offset | UTC−10 / UTC−9 in summer |
| Reference zone | Pacific/Honolulu |
| Military letter | W (Whiskey) |
States in the Hawaii–Aleutian Time Zone
Parts of other states
- Alaska: the western Aleutian Islands, west of about 169.5° W (Adak, Atka)
Major cities
| City | State |
|---|---|
| Adak | Alaska |
| Honolulu | Hawaii |
| Hilo | Hawaii |
| Kahului | Hawaii |
Abbreviation pages: HST
Questions people ask
What states are in the Hawaii–Aleutian Time Zone?
1 states and territories use Hawaii–Aleutian Time as their main time, and 1 more have parts in it. They're all listed above.
Is it HST or HDT right now?
From the second Sunday in March to the first Sunday in November it's HDT (UTC−9); the rest of the year it's HST (UTC−10). The live clock at the top shows which applies today.
What is Hawaii–Aleutian Time in UTC?
UTC−10 in winter and UTC−9 in summer.
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