AHDT to HAST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
3:00 am03:00 AHDT (UTC-9), Nov 3, 2026 = 2:00 am02:00 HAST (UTC-10), Nov 3, 2026
AHDT is 1 hour ahead of HAST.
AHDT and HAST examples
These examples always use AHDT (UTC-9) and HAST (UTC-10). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
AHDT is 1 hour ahead of HAST.
How the time difference changes
AHDT is 1 hour ahead of HAST year-round.
Working hours of 9:00 am to 6:00 pm in AHDT correspond to 8:00 am to 5:00 pm in HAST.Working hours of 09:00 to 18:00 in AHDT correspond to 08:00 to 17:00 in HAST.
Compare AHDT time with HAST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Alaska-Hawaii Daylight Time is 1 hour ahead of Hawaii-Aleutian Standard Time.
3:00 am03:00 in AHDT is 2:00 am02:00 in HAST
AHDT to HAST call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in AHDT which corresponds to 9am-5pm09:00-17:00 in HAST
3:00 am03:00 Alaska-Hawaii Daylight Time (AHDT). Offset UTC -9:00 hours
2:00 am02:00 Hawaii-Aleutian Standard Time (HAST). Offset UTC -10:00 hours
3:00 am03:00 AHDT / 2:00 am02:00 HAST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| AHDT | HAST |
|---|---|
| 11:00pm previous day | |
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| 5:00pm | |
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| 23:00 previous day | |
| 00:00 | |
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Alaska-Hawaii Daylight Time
Offset: AHDT is 9 hours behind Greenwich Mean Time (GMT).
AHDT representations, usage and related time zones
- -09 - basic short
- -0900 - basic
- -09:00 - extended
- -0900 - sign character (-) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the west of the zero meridian.
- Victor - Military abbreviation for AHDT
- V - short form of 'Victor'
- AKST - Alaska Standard Time
- AHDT - Alaska-Hawaii Daylight Time
- HADT - Hawaii-Aleutian Daylight Time
- GAMT - Gambier Time
- HDT - Hawaii-Aleutian Daylight Time
- V - Victor Time Zone
Hawaii-Aleutian Standard Time
Offset: HAST is 10 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: United States
Principal Cities: The largest city in the HAST time zone is Honolulu in the United States, with about 350,964 people. Other major cities in this time zone include Pearl City, Hilo, Kailua, Waipahu.
Today all shaded areas are on HAST.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Hawaii-Aleutian Daylight Time (HDT).
Start: Hawaii-Aleutian Standard Time (HAST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Hawaii-Aleutian Standard Time (HAST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
HAST 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 an offset of ten hours to the west of the zero meridian.
- Whiskey - Military abbreviation for HAST
- W - short form of 'Whiskey'
- HAST - Hawaii-Aleutian Standard Time
- CKT - Cook Island Time
- HST - Hawaii Standard Time
- TAHT - Tahiti Time
- W - Whiskey Time Zone