Where and When is HST Observed?

North America

US 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)

US states using HST all year:

  • Hawaii

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:

  • CKT – Cook Island Time
  • TAHT – Tahiti Time
  • W – Whiskey Time Zone

Time zones by continent/region

  • Africa
  • Antarctica
  • Asia
  • Atlantic
  • Australia
  • Caribbean
  • Central America
  • Europe
  • Indian Ocean
  • Military
  • North America
  • Pacific
  • South America

See all Time zone abbreviations

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HST time now

11:44:09 pm

Sunday, August 31, 2025

  • HST is currently observed in Honolulu
  • HST will be observed in Adak starting from Nov 2, 2025 at 2:00 am
  • UTC Offset: UTC -10
  • 6 hours behind Toronto

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Example cities

USA – Honolulu (All Year)
USA – Adak (Winter)
USA – Hilo (All Year)
US Minor Outlying Islands – Palmyra Atoll (All Year)

Related time zones

HDT – Hawaii-Aleutian Daylight Time (Daylight Time)


Time Zone Map with DST

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