HST to GMT Time Converter
Hawaii Standard Time → Greenwich Mean Time
HST
UTC-10
Hawaii Standard Time
GMT
UTC+0
Greenwich Mean Time
GMT observes DST — offset shifts ±1h during transitions
Hawaii Standard Time (HST) is 10 hours ahead Greenwich Mean Time (GMT). When it is noon in HST, it is 10 PM in GMT. This offset may change during Daylight Saving Time transitions.
All 24 Hours — HST to GMT
Click any row to see the full detail page. Current hour in HST is highlighted.
Best Meeting Times — HST & GMT
Recommended windows where both HST and GMT participants are within working hours (8 AM–6 PM).
Tip: When scheduling between HST and GMT, aim for the “Best” windows above. These times keep both parties within normal working hours, avoiding early-morning or late-evening fatigue. Note that one of these time zones observes Daylight Saving Time — the offset may shift ±1 hour around transition dates.
Related Time Zone Conversions
Frequently Asked Questions — HST to GMT
Hawaii Standard Time (HST) is 10 hours ahead of Greenwich Mean Time (GMT). HST is UTC-10 and GMT is UTC+0. This offset may shift by ±1 hour during Daylight Saving Time transitions.
Live Now
HST
UTC-10
01:36:20
Saturday
GMT
UTC+0
11:36:20
Saturday
Right now, 1 AM HST = 11 AM GMT
Business Hours Quick Jump
Reverse Conversion
GMT to HST
Greenwich Mean Time → Hawaii Standard Time
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