Where and When is HDT Observed?

North America

US states using HDT in the summer and HST in the winter:

  • Alaska - Aleutian Islands west of 169.30 West (east of 169.30 West use AKST/AKDT)

Other Time Zones in UTC -9

Some time zones exist that have the same offset as HDT, but can be found under a different name:

  • AKST – Alaska Standard Time
  • GAMT – Gambier Time
  • V – Victor 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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HDT time now

12:45:14 am

Monday, September 1, 2025

  • HDT will be observed in Adak until Nov 2, 2025 at 2:00 am
  • UTC Offset: UTC -9
  • 5 hours behind Toronto

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Example cities

USA – Adak (Summer)

Related time zones

HST – Hawaii Standard Time (Standard Time)


Time Zone Map with DST

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