HADT to U Converter
Quick answers
Selected conversion
3:00 am03:00 HADT (UTC-9), Oct 12, 2026 = 4:00 am04:00 U (UTC-8), Oct 12, 2026
HADT is 1 hour behind U.
HADT and U examples
These examples always use HADT (UTC-9) and U (UTC-8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
HADT is 1 hour behind U.
How the time difference changes
For most of the year, HADT is 1 hour behind U. At other times of the year, HST is 2 hours behind U.
For most of the year, working hours of 9:00 am to 5:00 pm in HADT correspond to 10:00 am to 6:00 pm in U. At other times of the year, working hours of 9:00 am to 5:00 pm in HST correspond to 11:00 am to 7:00 pm in U.For most of the year, working hours of 09:00 to 17:00 in HADT correspond to 10:00 to 18:00 in U. At other times of the year, working hours of 09:00 to 17:00 in HST correspond to 11:00 to 19:00 in U.
Compare HADT time with U time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Hawaii-Aleutian Daylight Time is 1 hour behind Uniform Time Zone.
3:00 am03:00 in HADT is 4:00 am04:00 in U
HADT to U call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in HADT which corresponds to 10am-5pm10:00-17:00 in U
3:00 am03:00 Hawaii-Aleutian Daylight Time (HADT). Offset UTC -9:00 hours
4:00 am04:00 Uniform Time Zone (U). Offset UTC -8:00 hours
3:00 am03:00 HADT / 4:00 am04:00 U
| HADT | U |
|---|---|
| 12:00am | 1:00am |
| 1:00am | 2:00am |
| 2:00am | 3:00am |
| 3:00am | 4:00am |
| 4:00am | 5:00am |
| 5:00am | 6:00am |
| 6:00am | 7:00am |
| 7:00am | 8:00am |
| 8:00am | 9:00am |
| 9:00am | 10:00am |
| 10:00am | 11:00am |
| 11:00am | 12:00pm |
| 12:00pm | 1:00pm |
| 1:00pm | 2:00pm |
| 2:00pm | 3:00pm |
| 3:00pm | 4:00pm |
| 4:00pm | 5:00pm |
| 5:00pm | 6:00pm |
| 6:00pm | 7:00pm |
| 7:00pm | 8:00pm |
| 8:00pm | 9:00pm |
| 9:00pm | 10:00pm |
| 10:00pm | 11:00pm |
| 11:00pm | 12:00am |
| 00:00 | 01:00 |
| 01:00 | 02:00 |
| 02:00 | 03:00 |
| 03:00 | 04:00 |
| 04:00 | 05:00 |
| 05:00 | 06:00 |
| 06:00 | 07:00 |
| 07:00 | 08:00 |
| 08:00 | 09:00 |
| 09:00 | 10:00 |
| 10:00 | 11:00 |
| 11:00 | 12:00 |
| 12:00 | 13:00 |
| 13:00 | 14:00 |
| 14:00 | 15:00 |
| 15:00 | 16:00 |
| 16:00 | 17:00 |
| 17:00 | 18:00 |
| 18:00 | 19:00 |
| 19:00 | 20:00 |
| 20:00 | 21:00 |
| 21:00 | 22:00 |
| 22:00 | 23:00 |
| 23:00 | 00:00 |
Hawaii-Aleutian Daylight Time
Offset: HADT is 9 hours behind Greenwich Mean Time (GMT) and is used in North America
Daylight Saving: Hawaii-Aleutian Daylight Time (HADT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Hawaii-Aleutian Standard Time (HAST).
Start: Hawaii-Aleutian Daylight Time (HADT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.
End: Hawaii-Aleutian Daylight Time (HADT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.
HADT 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 HADT
- V - short form of 'Victor'
- AKST - Alaska Standard Time
- AHDT - Alaska-Hawaii Daylight Time
- HADT - Hawaii-Aleutian Daylight Time
- GAMT - Gambier Time
- HDT - Hawaii Daylight Time
- V - Victor Time Zone
Uniform Time Zone
Offset: U is 8 hours behind Greenwich Mean Time (GMT) and is used in Military
Daylight Saving: Clocks in Uniform Time Zone (U) do not change for daylight saving time, so U stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
U representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
- Uniform - Military abbreviation for U
- U - short form of 'Uniform'
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone