GMT to HST Time Zone Converter — Time Difference Between Reykjavik and Honolulu
Drag the slider or click the time display to type a specific hour and instantly convert GMT to HST. The time difference between Reykjavik and Honolulu is 10 hours — Honolulu (HST) is behind Reykjavik (GMT) (UTC+0:00 vs UTC-10:00); for example, 9:00 AM GMT = 11:00 PM (previous day) HST; to convert, subtract 10 hours. Use this GMT to HST time zone converter to check the live current time in both cities, browse the 24-hour GMT to HST conversion table, plan international meetings, find the best overlap hours, and account for daylight saving time changes automatically.
GMT
Greenwich Mean Time
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HST
Hawaii Standard Time
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GMT to HST Time Zone Difference — Hour-by-Hour Conversion Table
Scan each row to convert any GMT time to HST and find the exact time difference between Reykjavik and Honolulu hour by hour. Amber-highlighted rows mark standard daytime business hours, making it easy to spot overlapping work windows for scheduling international meetings or remote team calls. Tap the arrows to jump between days, click "Today" to reset, and all daylight saving time transitions are handled automatically.
| GMT (Reykjavik) | HST (Honolulu) |
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What Time Is It Now in Reykjavik?
Live current local time in Reykjavik, Iceland — GMT (UTC+0:00). Updates every second.
What Time Is It Now in Honolulu?
Live current local time in Honolulu, United States — HST (UTC-10:00). Updates every second.
GMT to HST Quick Reference
Common business hours in Reykjavik converted to Honolulu local time — handy for scheduling video calls, client meetings, and international conference calls.
GMT & HST Meeting Planner — Best Overlapping Hours
Use the color-coded conversion table above to find overlapping business hours between Reykjavik and Honolulu. Amber rows mark standard daytime work hours (8 AM–6 PM local time) — pick a slot that falls in amber on both sides for a meeting time that works for everyone. Since GMT (UTC+0:00) is 10 hours behind HST (UTC-10:00), this time zone meeting planner is ideal for scheduling international calls, remote team standups, and cross-border project syncs.
Why Trust This Reykjavik to Honolulu Time Zone Converter?
ConvertFlash uses the IANA Time Zone Database — the same authoritative source that powers your phone, browser, and every major operating system — so every Reykjavik to Honolulu conversion handles daylight saving time transitions, half-hour UTC offsets, and historical time zone changes automatically. The live world clock updates every second, and the hour-by-hour conversion table regenerates correctly for any past or future date you select, making it reliable for both real-time checks and advance international scheduling.
GMT — Greenwich Mean Time
Reykjavik, Iceland — UTC offset UTC+0:00
- Abbreviation
- GMT
- UTC Offset
- UTC+0:00
- City
- Reykjavik
- Country
- Iceland
HST — Hawaii Standard Time
Honolulu, United States — UTC offset UTC-10:00
- Abbreviation
- HST
- UTC Offset
- UTC-10:00
- City
- Honolulu
- Country
- United States