Also known as: HADT – Hawaii Daylight Time
No locations currently on HDT. Would you like to see HST?
North America: HDT is currently not observed because locations are on standard time and are observing HST.
![Time zone map of HDT](http://webcf.waybackmachine.org/web/20220116112151im_/https://c.tadst.com/gfx/tzpage/hadt.1636282800.png?1447)
No locations currently on HDT.
Observes HDT part of the year.
Areas with same time currently (UTC -9).
Observes HDT part of the year.
Areas with same time currently (UTC -9).
No locations are currently on HDT – Hawaii-Aleutian Daylight Time.
Observes HDT – Hawaii-Aleutian Daylight Time part of the year, but not currently.
Currently has same time zone offset as HDT (UTC -9) but different time zone name.
Observes HDT – Hawaii-Aleutian Daylight Time part of the year, but not currently.
Currently has same time zone offset as HDT (UTC -9) but different time zone name.
Hawaii-Aleutian Daylight Time (HDT) is 9 hours behind Coordinated Universal Time (UTC). This time zone is a Daylight Saving Time time zone and is used in: North America.
Where and When is HDT Observed?
North America
U.S. states using HDT in the summer and HST in the winter:
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: