What is HST in BST?
British Time is 10 hours ahead
Convert a time
GMT — British Time
8:00 am
GMT, Sat, the next day
- Time in Honolulu
- 10:29:43 PM
- Time in London
- 8:29:43 AM
- Difference
- +10 h
- Next clock change
- March 28, 2027
When the difference changes
Hawaii Standard Time and British Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – March 27, 2027British Time is 10 hours ahead
- March 27, 2027 – October 30, 2027British Time is 11 hours ahead
- October 30, 2027 – onwardsBritish Time is 10 hours ahead
Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.
Daylight saving
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
British Time
Clocks go forward one hour — 1:00 am becomes 2:00 am local time, and the zone is on BST after that.
HST to BST conversion table
Every hour of Friday, November 6, 2026, converted from Hawaii Standard Time to British Time. 10 of the 24 hours fall on a different calendar day in London, which is marked.
- 12:00 am HST
- 10:00 am GMT
- 1:00 am HST
- 11:00 am GMT
- 2:00 am HST
- 12:00 pm GMT
- 3:00 am HST
- 1:00 pm GMT
- 4:00 am HST
- 2:00 pm GMT
- 5:00 am HST
- 3:00 pm GMT
- 6:00 am HST
- 4:00 pm GMT
- 7:00 am HST
- 5:00 pm GMT
- 8:00 am HST
- 6:00 pm GMT
- 9:00 am HST
- 7:00 pm GMT
- 10:00 am HST
- 8:00 pm GMT
- 11:00 am HST
- 9:00 pm GMT
- 12:00 pm HST
- 10:00 pm GMT
- 1:00 pm HST
- 11:00 pm GMT
- 2:00 pm HST
- 12:00 am GMT+1 day
- 3:00 pm HST
- 1:00 am GMT+1 day
- 4:00 pm HST
- 2:00 am GMT+1 day
- 5:00 pm HST
- 3:00 am GMT+1 day
- 6:00 pm HST
- 4:00 am GMT+1 day
- 7:00 pm HST
- 5:00 am GMT+1 day
- 8:00 pm HST
- 6:00 am GMT+1 day
- 9:00 pm HST
- 7:00 am GMT+1 day
- 10:00 pm HST
- 8:00 am GMT+1 day
- 11:00 pm HST
- 9:00 am GMT+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in Honolulu and one in London — the gap is too wide. A call has to sit early or late for one side. Early morning in Honolulu is the usual compromise, since that is late afternoon or evening in London.
A note on BST: it can also mean Bangladesh Standard Time (UTC+6). This page means British Summer Time.
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving
British Time (GMT) is used in the whole United Kingdom. In winter the UK is on GMT; from late March to late October it is on BST, an hour ahead.
Other conversions
- BST to HST
- HST to UTC
- HST to GMT
- HST to EST
- HST to CST
- HST to MST
- HST to PST
- HST to AKST
- HST to CET
- HST to IST
- HST to CST (China)
- HST to JST
- HST to AEST
- HST to AST
- HST to Mexico City
- HST to BRT
- HST to ART
- HST to EET
- HST to WET
- HST to MSK
- HST to TRT
- HST to SAST
- HST to WAT
- HST to EAT
- HST to GST
- HST to PKT
- HST to ICT
- HST to WIB
- HST to SGT
- HST to HKT
- HST to KST
- HST to PHT
- HST to AWST
- HST to ACST
- HST to NZST
- All zones