HST to U Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
2:00 am02:00 HST (UTC-10), Nov 10, 2026 = 4:00 am04:00 U (UTC-8), Nov 10, 2026
HST is 2 hours behind U.
HST and U examples
These examples always use HST (UTC-10) 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.
HST is 2 hours behind U.
How the time difference changes
HST is 2 hours behind U year-round.
Working hours of 9:00 am to 6:00 pm in HST correspond to 11:00 am to 8:00 pm in U.Working hours of 09:00 to 18:00 in HST correspond to 11:00 to 20:00 in U.
Compare HST time with U time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Hawaii Standard Time is 2 hours behind Uniform Time Zone.
2:00 am02:00 in HST is 4:00 am04:00 in U
HST to U call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in HST which corresponds to 11am-6pm11:00-18:00 in U.
2:00 am02:00 Hawaii Standard Time (HST). Offset UTC -10:00 hours
4:00 am04:00 Uniform Time Zone (U). Offset UTC -8:00 hours
2:00 am02:00 HST / 4:00 am04:00 U
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.
| HST | U |
|---|---|
| 2:00am | |
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| 4:00am | |
| 5:00am | |
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| 10:00am | |
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| 5:00pm | |
| 6:00pm | |
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| 8:00pm | |
| 9:00pm | |
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| 11:00pm | |
| 12:00am next day | |
| 1:00am next day | |
| 02:00 | |
| 03:00 | |
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| 05:00 | |
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| 07:00 | |
| 08:00 | |
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| 10:00 | |
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| 00:00 next day | |
| 01:00 next day |
Hawaii Standard Time
Offset: HST is 10 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: United States
Principal Cities: The largest city in the HST 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.
Daylight Saving: Some places on Hawaii Standard Time (HST) keep the same time all year, while others use HST for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today all shaded areas are on HST.
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 an offset of ten hours to the west of the zero meridian.
- Whiskey - Military abbreviation for HST
- W - short form of 'Whiskey'
- America/Adak
- America/Atka
- HST
- Pacific/Honolulu
- Pacific/Johnston
- US/Aleutian
- US/Hawaii
- HAST - Hawaii-Aleutian Standard Time
- CKT - Cook Island Time
- HST - Hawaii Standard Time
- TAHT - Tahiti Time
- W - Whiskey Time Zone
Uniform Time Zone
Offset: U is 8 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Mexico, Pitcairn, United States
Principal Cities: The largest city in the U time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
Daylight Saving: Some places on Uniform Time Zone (U) keep the same time all year, while others use U for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the shaded areas are on UTC−9 (AKST).
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