Hawaii-Aleutian

Hawaii-Aleutian Time

Hawaii-Aleutian Time covers all of Hawaii and the Aleutian Islands west of 169 degrees 30 minutes west longitude. Its standard offset is UTC-10:00, but daylight-saving practice differs between Hawaii and Alaska.

Standard: UTC-10:00Daylight: UTC-09:00Varies within this zone

Time-zone facts

Standard time
HST · UTC-10:00
Daylight time
HDT · UTC-09:00
Daylight saving
Varies within this zone
IANA identifiers
Pacific/Honolulu, America/Adak

U.S. places in Hawaii-Aleutian Time

2 U.S. states, districts, or territories are wholly or partly covered by this time zone.

States entirely in this zone

States partly in this zone

Daylight saving time

Daylight saving observance varies within Hawaii-Aleutian Time. Check the regional exceptions below and use an IANA identifier for software calculations.

  • Hawaii does not observe daylight saving time.
  • The western Aleutian part of Alaska does observe daylight saving time.

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Jurisdiction lists provide an overview, but split states and local exceptions require a precise location lookup.

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