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HST – Hawaii Standard Time (Standard Time)

Time Zone names, codes and abbreviations for Standard Time and Daylight Saving Time (DST) around the world.

Also known as: HAST – Hawaii-Aleutian Standard Time

North America: Most locations are on HST, but a few locations are still observing HDT.

Time zone map of HST
Currently observing HST.
Observes HST part of the year.
Areas with same time currently (UTC -10).
Currently observing HST – Hawaii Standard Time.
Observes HST – Hawaii Standard Time part of the year, but not currently.
Currently has same time zone offset as HST (UTC -10) but different time zone name.

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?

North America

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: