Also known as: HAST – Hawaii-Aleutian Standard Time
North America: Most locations are on HST, but a few locations are still observing HDT.
Where and When is HST Observed?
U.S. states using HST in the winter and HDT in the summer:
U.S. states using HST all year:
Other Time Zones in UTC -10
Some time zones exist that have the same offset as HST, but can be found under a different name:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- South America