HDT – Hawaii-Aleutian Daylight Time (Daylight Saving Time)
Also known as: HADT – Hawaii Daylight Time
North America: HADT is not observed in any location this year.
Please use the search field on the right to find the correct local time in any city.
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: HST (Hawaii Standard Time).
Email Time Zone Indicator: -0900
An email sent from someone in the Hawaii-Aleutian Daylight Time (HDT) 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 HDT Observed?
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:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- South America
No locations currently on HDT
Find current time and time zone by city
USA – Adak (Summer)
Related time zones
HST – Hawaii Standard Time (Standard Time)