49 CFR Part 71 — Standard Time Zone Boundaries

Daylight Saving Time

IANA tzdb zone1970.tab

Uniform Time

Time Zone Database Release 2026d

Hawaii does not observe daylight saving time and remains on HST at UTC-10:00 throughout the year.

U.S. Census Bureau TIGERweb Incorporated Places (ACS 2026)

Hawaii

Hawaii has no incorporated places in the Census Bureau's January 1, 2026 TIGERweb dataset; Census places in Hawaii are census-designated places rather than incorporated municipalities.

All of Hawaii is legally in Hawaii-Aleutian Time.

Hawaii is entirely in Hawaii-Aleutian Time and does not change clocks for daylight saving time.

Hawaii remains on UTC-10:00 throughout the year. The western Aleutian part of Alaska observes daylight saving time and advances to UTC-09:00.

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.

Time Zones in Hawaii

Time-zone coverage

Hawaii-Aleutian Time

Daylight saving time in Hawaii

Check an address near a boundary