North American time zones:

HADT – Hawaii-Aleutian Daylight Time

Time zone offset: UTC - 9 hours

Note that HADT is a daylight saving time/summer time zone. It is generally only used during the summer in the places listed below, during the winter HAST is used instead

Time zone abbreviation: HADT

Email time zone indicator: -0900

An email sent from someone in the HADT time zone will have the time zone listed as "-0900" in the headers of the email. (However, "-0900" does not have to be in HADT, as other time zones could have the same UTC offset).

Where and when is HADT observed?

HADT is used in the summer in these US states (HAST during winter)

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

Example location in HADT

• Adak - during summer

Other time zones in North America

• NST - Newfoundland Standard Time
• NDT - Newfoundland Daylight Time
• AST - Atlantic Standard Time
• ADT - Atlantic Daylight Time
• EST - Eastern Standard Time
• EDT - Eastern Daylight Time
• CST - Central Standard Time
• CDT - Central Daylight Time
• MST - Mountain Standard Time
• MDT - Mountain Daylight Time
• PST - Pacific Standard Time
• PDT - Pacific Daylight Time
• AKST - Alaska Standard Time
• AKDT - Alaska Daylight Time
• HAST - Hawaii-Aleutian Standard Time

Time zones in other regions

• Australia
• Europe
• Military

Related links

• Time zone abbreviations world-wide
• The World Clock - Time Zones - current time around the world
• The World Clock - Time Zone Converter - Convert between time zones
• World Clock - North America - current time in North America