Offset
The time difference between Greenwich Mean Time and Honolulu is 11 hours.
Greenwich Mean Time (BST) is ahead of Honolulu (HST).
BST: UTC+1
HST: UTC-10
Greenwich Mean Time is currently observing daylight saving time; Honolulu is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Greenwich Mean Time and Honolulu don't overlap on the same weekday. Honolulu is 11 hours behind Greenwich Mean Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Greenwich Mean Time (7 AM–9 AM in Honolulu) — suggest 7:00 PM Greenwich Mean Time (8:00 AM Honolulu).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Honolulu uses Hawaii Time (HST). To call United States, dial +1.
Honolulu is approximately 7,250 miles north of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | Honolulu | Day |
|---|---|---|
| 12:00 am | 1:00 pm | -1 day |
| 1:00 am | 2:00 pm | -1 day |
| 2:00 am | 3:00 pm | -1 day |
| 3:00 am | 4:00 pm | -1 day |
| 4:00 am | 5:00 pm | -1 day |
| 5:00 am | 6:00 pm | -1 day |
| 6:00 am | 7:00 pm | -1 day |
| 7:00 am | 8:00 pm | -1 day |
| 8:00 am | 9:00 pm | -1 day |
| 9:00 am | 10:00 pm | -1 day |
| 10:00 am | 11:00 pm | -1 day |
| 11:00 am | 12:00 am | Same day |
| 12:00 pm | 1:00 am | Same day |
| 1:00 pm | 2:00 am | Same day |
| 2:00 pm | 3:00 am | Same day |
| 3:00 pm | 4:00 am | Same day |
| 4:00 pm | 5:00 am | Same day |
| 5:00 pm | 6:00 am | Same day |
| 6:00 pm | 7:00 am | Same day |
| 7:00 pm | 8:00 am | Same day |
| 8:00 pm | 9:00 am | Same day |
| 9:00 pm | 10:00 am | Same day |
| 10:00 pm | 11:00 am | Same day |
| 11:00 pm | 12:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Honolulu does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:47 AM
- Sunset
- 9:13 PM
- Day length
- 16h 25m
- Sunrise
- 5:50 AM
- Sunset
- 7:12 PM
- Day length
- 13h 23m
Daylight overlap: 4h 23m — 4:50 PM–9:13 PM in Greenwich Mean Time (5:50 AM–10:13 AM in Honolulu). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Hawaii Time
- HNL
Related conversions
Common conversions
- What is 9:00 am GMT in Honolulu?
- 9:00 am GMT is 10:00 pm Honolulu, the previous day.
- What is 12:00 pm GMT in Honolulu?
- 12:00 pm GMT is 1:00 am Honolulu.
- What is 12:30 pm GMT in Honolulu?
- 12:30 pm GMT is 1:30 am Honolulu.
- What is 2:00 pm GMT in Honolulu?
- 2:00 pm GMT is 3:00 am Honolulu.
- What is 5:00 pm GMT in Honolulu?
- 5:00 pm GMT is 6:00 am Honolulu.
- What is 11:30 pm GMT in Honolulu?
- 11:30 pm GMT is 12:30 pm Honolulu.