Time zone converter

UTC to HST

Hawaii Time (HST) is 10 hours behind Coordinated Universal Time (UTC) all year: 9:00 AM UTC is 11:00 PM HST the previous day.

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

HST vs UTC over the next 12 months

PeriodHST isExample
Oct 23, 2026 onwards10 hours behind9:00 AM UTC = 11:00 PM HST (previous day)

UTC to HST conversion table

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

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

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: 6:00 PM–8:00 PM UTC, which is 8:00 AM–10:00 AM HST.

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

Daylight saving time

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

Where these clocks are used

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

Questions

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

On Oct 23, 2026, 9:00 AM UTC is 11:00 PM HST the previous day.

How many hours behind UTC is HST?

HST is always 10 hours behind UTC.

Do UTC and HST observe daylight saving time?

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

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

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

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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.