Hawaii-Aleutian Daylight Time is 1 hour ahead of Hawaii Standard Time
So 9:30 pm21:30 in HADT is 8:30 pm20:30 in HST
9:30 pm21:30 Hawaii-Aleutian Daylight Time (HADT). Offset UTC -9:00 hours
8:30 pm20:30 Hawaii Standard Time (HST). Offset UTC -10:00 hours
9:30 pm21:30 HADT / 8:30 pm20:30 HST
Hawaii Standard Time
Offset: HST is 10 hours behind Greenwich Mean Time (GMT) and is used in Pacific
Countries: It is used in following countries: United States
Principal Cities: The largest city in the HST timezone is Honolulu from USA with population about 371657 people. Other major cities in the area are Pearl City, Hilo, Kailua, Waipahu
Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Hawaii Daylight Time (HDT).
End: HST ended and clocks were set one hour forward on Sunday, March 8, 2020, at 2:00 (2:00 am) local time.
Start: HST starts and clocks are set one hour back on Sunday, November 1, 2020, at 2:00 (2:00 am) local time.
HST representations, usage and related time zones
- -10 - basic short
- -1000 - basic
- -10:00 - extended
- -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates ten hour and zero minutes time differences to the west of the zero meridian.
- Whiskey - Military abbreviation for HST
- W - short form of 'Whiskey'
Time zones with the GMT -10 offset:
- HAST - Hawaii-Aleutian Standard Time
- CKT - Cook Island Time
- HST - Hawaii Standard Time
- TAHT - Tahiti Time
- W - Whiskey Time Zone
- AHST -