HDT to U Converter
HDT is not used on this date
This converter keeps HDT at GMT -9. Honolulu uses HST (GMT -10) on this date. Open the HST converter, or choose Honolulu, Pearl City, or Hilo for city-specific time.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
HDT and U examples
These examples always use HDT (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.
HDT is 1 hour behind U.
How the time difference changes
HDT is 1 hour behind U year-round.
Working hours of 9:00 am to 5:00 pm in HDT correspond to 10:00 am to 6:00 pm in U.
Compare HDT time with U time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Hawaii Daylight Time is 1 hour behind Uniform Time Zone
3:00 am03:00 in HDT is 4:00 am04:00 in U
HDT to U call time
Best time for a conference call or a meeting is between 9am-4pm in HDT which corresponds to 10am-5pm in U
3:00 am03:00 Hawaii Daylight Time (HDT). Offset UTC -9:00 hours
4:00 am04:00 Uniform Time Zone (U). Offset UTC -8:00 hours
3:00 am03:00 HDT / 4:00 am04:00 U
| HDT | U |
|---|---|
| 12am (midnight) | 1am |
| 1am | 2am |
| 2am | 3am |
| 3am | 4am |
| 4am | 5am |
| 5am | 6am |
| 6am | 7am |
| 7am | 8am |
| 8am | 9am |
| 9am | 10am |
| 10am | 11am |
| 11am | 12pm (noon) |
| 12pm (noon) | 1pm |
| 1pm | 2pm |
| 2pm | 3pm |
| 3pm | 4pm |
| 4pm | 5pm |
| 5pm | 6pm |
| 6pm | 7pm |
| 7pm | 8pm |
| 8pm | 9pm |
| 9pm | 10pm |
| 10pm | 11pm |
| 11pm | 12am (midnight) |
| 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 Daylight Time
Offset: HDT is 9 hours behind Greenwich Mean Time (GMT) and is used in Pacific
Countries using this time zone: United States
HDT 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 HDT
- V - short form of 'Victor'
- America/Adak
- America/Atka
- US/Aleutian
- 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.
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