Time zone converter

HST to UTC

Coordinated Universal Time (UTC) is 10 hours ahead of Hawaii Time (HST) all year: 9:00 AM HST is 7:00 PM UTC.

Hawaii Time
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Current time in Hawaii Time
Coordinated Universal Time
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Current time in Coordinated Universal Time
Pick a date and time to convert.

UTC vs HST over the next 12 months

PeriodUTC isExample
Oct 23, 2026 onwards10 hours ahead9:00 AM HST = 7:00 PM UTC

HST to UTC conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

Hawaii TimeCoordinated Universal Time
12:00 AM10:00 AM
1:00 AM11:00 AM
2:00 AM12:00 PM
3:00 AM1:00 PM
4:00 AM2:00 PM
5:00 AM3:00 PM
6:00 AM4:00 PM
7:00 AM5:00 PM
8:00 AM6:00 PM
9:00 AM7:00 PM
10:00 AM8:00 PM
11:00 AM9:00 PM
12:00 PM10:00 PM
1:00 PM11:00 PM
2:00 PM12:00 AM (next day)
3:00 PM1:00 AM (next day)
4:00 PM2:00 AM (next day)
5:00 PM3:00 AM (next day)
6:00 PM4:00 AM (next day)
7:00 PM5:00 AM (next day)
8:00 PM6:00 AM (next day)
9:00 PM7:00 AM (next day)
10:00 PM8:00 AM (next day)
11:00 PM9:00 AM (next day)

Best time for a meeting

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 2 hours on a weekday: 8:00 AM–10:00 AM HST, which is 6:00 PM–8:00 PM UTC.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

Neither HST nor UTC changes its clocks, so the difference is the same all year.

Where these clocks are used

  • Hawaii Time (HST): Hawaii, which does not observe daylight saving time. IANA zone Pacific/Honolulu.
  • Coordinated Universal Time (UTC): servers, aviation and logs worldwide; the same clock as GMT. IANA zone Etc/UTC.

Questions

What time is it in UTC when it is 9 AM HST?

On Oct 23, 2026, 9:00 AM HST is 7:00 PM UTC.

How many hours ahead of HST is UTC?

UTC is always 10 hours ahead of HST.

Do HST and UTC observe daylight saving time?

Hawaii Time stays on UTC−10 all year. Coordinated Universal Time stays on UTC±0 all year.

What is the best time for a meeting between HST and UTC?

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 2 hours on a weekday: 8:00 AM–10:00 AM HST, which is 6:00 PM–8:00 PM UTC.

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Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.