Also known as: HAST – Hawaii-Aleutian Standard Time
North America: Most locations are on HST, but a few locations are still observing HDT.
Please use the search field on the right to find the correct local time in any city.
Hawaii Standard Time (HST) is 10 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America, Pacific.
See full time zone map
Summer Time & DST
Some places observe daylight saving time/summer time during the summer, and therefore use HDT (Hawaii-Aleutian Daylight Time) in the summer.
Where and When is HST Observed?
U.S. states using HST in the winter and HDT in the summer:
- Alaska - Aleutian Islands west of 169.30 West (east of 169.30 West use AKST/AKDT)
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: