What is GMT in BST?
British Time is 1 hour ahead
Greenwich Mean Time is on UTC+0:00 and British Time is on UTC+1:00 right now. British Time is on daylight saving, so its clocks read BST. The gap changes during the year — see below.
- Time in Greenwich
- 1:34 am
- Time in London
- 2:34 am
- Difference
- +1 h
- Next clock change
- October 25, 2026
Convert a time
BST — British Time
2:00 am
Wed
When the difference changes
Greenwich Mean 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 – October 25, 2026British Time is 1 hour ahead
- October 25, 2026 – March 28, 2027British Time is the same time
- March 28, 2027 – onwardsBritish Time is 1 hour ahead
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
Greenwich Mean Time
Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.
British Time
Clocks go back one hour at 2am local time, becoming GMT.
GMT to BST conversion table
Every hour of Wednesday, September 23, 2026, converted from Greenwich Mean Time to British Time. 1 of the 24 hours fall on a different calendar day in London, which is marked.
- 12:00 am GMT
- 1:00 am BST
- 1:00 am GMT
- 2:00 am BST
- 2:00 am GMT
- 3:00 am BST
- 3:00 am GMT
- 4:00 am BST
- 4:00 am GMT
- 5:00 am BST
- 5:00 am GMT
- 6:00 am BST
- 6:00 am GMT
- 7:00 am BST
- 7:00 am GMT
- 8:00 am BST
- 8:00 am GMT
- 9:00 am BST
- 9:00 am GMT
- 10:00 am BST
- 10:00 am GMT
- 11:00 am BST
- 11:00 am GMT
- 12:00 pm BST
- 12:00 pm GMT
- 1:00 pm BST
- 1:00 pm GMT
- 2:00 pm BST
- 2:00 pm GMT
- 3:00 pm BST
- 3:00 pm GMT
- 4:00 pm BST
- 4:00 pm GMT
- 5:00 pm BST
- 5:00 pm GMT
- 6:00 pm BST
- 6:00 pm GMT
- 7:00 pm BST
- 7:00 pm GMT
- 8:00 pm BST
- 8:00 pm GMT
- 9:00 pm BST
- 9:00 pm GMT
- 10:00 pm BST
- 10:00 pm GMT
- 11:00 pm BST
- 11:00 pm GMT
- 12:00 am BST+1 day
Scheduling between the two
Working hours overlap from 9:00 am to 5:00 pm GMT, which is 10:00 am to 6:00 pm BST. Anything inside that window falls in the normal working day at both ends.
A note on BST: it can also mean Bangladesh Standard Time (UTC+6). This page means British Summer Time.
Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.
British Time (BST) 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.