BST to GMT time converter
Greenwich Mean Time (GMT) is the same time as British Time (BST) in January and 1 hour behind in July, because daylight saving time shifts the difference. Use the grid below to line up London and Greenwich: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 10:43 BST in London and 09:43 UTC in Greenwich.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
BST to GMT: frequently asked
What is the time difference between BST and GMT?
Greenwich Mean Time (GMT) is the same time as British Time (BST) in January and 1 hour behind in July, because daylight saving time shifts the difference.
What time is 9 AM BST in GMT?
9:00 AM BST is 9:00 AM GMT in January, and 8:00 AM GMT in July.
When do working hours overlap between London and Greenwich?
In January: Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 5:00 PM BST (9:00 AM to 5:00 PM GMT). In July: Both sides are within 9:00 AM–5:00 PM working hours between 10:00 AM and 5:00 PM BST (9:00 AM to 4:00 PM GMT).