HADT – Hawaii-Aleutian Daylight Time (Daylight Saving Time)
Also known as: HDT – Hawaii Daylight Time
HADT is currently not used at all
North America: HADT is currently not observed because locations are on standard time and are observing HAST.
Winter Time & DST
This time zone is a daylight saving/summer time zone, in the winter some places will switch to the corresponding standard time zone: HAST (Hawaii-Aleutian Standard Time).
Email time zone indicator: -0900
An email sent from someone in the Hawaii-Aleutian Daylight Time (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 Hawaii-Aleutian Daylight Time, as other time zones could have the same UTC offset).
Where and when is HADT observed?
Other time zones in UTC -9
Some time zones exist that have the same offset as HADT, but can be found under a different name:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- Other time standards
- South America
No locations currently on HADT
Find current time and time zone by city
U.S.A. – Adak (Summer)
Related time zones
HAST – Hawaii-Aleutian Standard Time (Standard Time)