Hawaii-Aleutian Daylight Time Zone - HADT

Hawaii-Aleutian Daylight Time is nine hours behind the Coordinated Universal Time standard, written as an offset of UTC - 9:00. That means to find the standard time in the zone you must subtract nine hours from Coordinated Universal Time.

Territories observing the time zone are primarily in North America. It runs through the Aleutian islands which are actually considered part of Alaska. Those in the time zone also refer to it as Hawaii Daylight Time or HDT.

During fall to winter months Hawaii-Aleutian Standard Time, or HAST is used, and then during Daylight Saving (spring to summer months) Hawaii-Aleutian Daylight Time or HADT is used.

Locations in Hawaii-Aleutican Daylight Time Zone

The following areas are included in the time zone:

• North America

  • Aleutian Islands West of 169.30 (Alaska)

Exceptions

The Aleutian Islands East of 169.30 observe Alaska Standard Time during the fall to winter months and Alaska Daylight Time during the spring and summer months.