The Hawaii-Aleutian Standard Time Zone is a geographic region that keeps time by subtracting ten hours from UTC.

The region includes the U.S. state of Hawaii and Alaska's Aleutian Islands west of 169° 30′ west. It is the time zone located just west of the Alaska Standard Time Zone.

Hawaii does not observe daylight saving time, while Alaska does.

See also

• Time zone
• Alaska Standard Time Zone
• Pacific Standard Time Zone
• Mountain Standard Time Zone
• Central Standard Time Zone
• Eastern Standard Time Zone
• Atlantic Standard Time Zone
• Newfoundland Standard Time Zone