HST to GMT
On Oct 23, 2026, UK time is 11 hours ahead of Hawaii Time: 9:00 AM HST is 8:00 PM BST. The gap changes during the year because of daylight saving time; the dates are below.
GMT vs HST over the next 12 months
| Period | GMT is | Example |
|---|---|---|
| Oct 23, 2026 to Oct 24, 2026 | 11 hours ahead | 9:00 AM HST = 8:00 PM BST |
| Oct 24, 2026 to Mar 27, 2027 | 10 hours ahead | 9:00 AM HST = 7:00 PM GMT |
| Mar 27, 2027 onwards | 11 hours ahead | 9:00 AM HST = 8:00 PM BST |
HST to GMT conversion table
Every hour of a weekday around Oct 23, 2026, in both zones.
| Hawaii Time | UK time |
|---|---|
| 12:00 AM | 10:00 AM |
| 1:00 AM | 11:00 AM |
| 2:00 AM | 12:00 PM |
| 3:00 AM | 1:00 PM |
| 4:00 AM | 2:00 PM |
| 5:00 AM | 3:00 PM |
| 6:00 AM | 4:00 PM |
| 7:00 AM | 5:00 PM |
| 8:00 AM | 6:00 PM |
| 9:00 AM | 7:00 PM |
| 10:00 AM | 8:00 PM |
| 11:00 AM | 9:00 PM |
| 12:00 PM | 10:00 PM |
| 1:00 PM | 11:00 PM |
| 2:00 PM | 12:00 AM (next day) |
| 3:00 PM | 1:00 AM (next day) |
| 4:00 PM | 2:00 AM (next day) |
| 5:00 PM | 3:00 AM (next day) |
| 6:00 PM | 4:00 AM (next day) |
| 7:00 PM | 5:00 AM (next day) |
| 8:00 PM | 6:00 AM (next day) |
| 9:00 PM | 7:00 AM (next day) |
| 10:00 PM | 8:00 AM (next day) |
| 11:00 PM | 9:00 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 GMT.
Comparing more than two places? The meeting planner lines up working hours for up to six cities.
Daylight saving time
UK time (GMT/BST)
- Oct 25, 2026: clocks go back 1 hour at 2:00 AM (UTC+1 → UTC±0)
- Mar 28, 2027: clocks go forward 1 hour at 1:00 AM (UTC±0 → UTC+1)
Where these clocks are used
- Hawaii Time (HST): Hawaii, which does not observe daylight saving time. IANA zone
Pacific/Honolulu. - UK time (GMT/BST): London, Edinburgh, Dublin and Lisbon keep the same clock. IANA zone
Europe/London.
Questions
What time is it in GMT when it is 9 AM HST?
On Oct 23, 2026, 9:00 AM HST is 8:00 PM BST. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.
How many hours ahead of HST is GMT?
It depends on the date. Oct 23, 2026 to Oct 24, 2026: GMT is 11 hours ahead. Oct 24, 2026 to Mar 27, 2027: GMT is 10 hours ahead. Mar 27, 2027 onwards: GMT is 11 hours ahead.
Do HST and GMT observe daylight saving time?
Hawaii Time stays on UTC−10 all year. UK time switches to BST (UTC+1) in summer and back to GMT (UTC±0) in winter.
What is the best time for a meeting between HST and GMT?
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 GMT.
Scheduling across time zones? Share one Caly booking link and every guest sees your free times in their own zone. Try Caly free
Related conversions
- GMT to HST (reverse)
- EST to GMT
- CST to GMT
- MST to GMT
- PST to GMT
- UTC to GMT
- CET to GMT
- IST to GMT
- SGT to GMT
- JST to GMT
- AEST to GMT
- AKST to GMT
- All time zones
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.