GMT to BST time converter
British Time (BST) is the same time as Greenwich Mean Time (GMT) in January and 1 hour ahead in July, because daylight saving time shifts the difference. Use the grid below to line up Greenwich and London: 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 09:43 UTC in Greenwich and 10:43 BST in London.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
GMT to BST: frequently asked
What is the time difference between GMT and BST?
British Time (BST) is the same time as Greenwich Mean Time (GMT) in January and 1 hour ahead in July, because daylight saving time shifts the difference.
What time is 9 AM GMT in BST?
9:00 AM GMT is 9:00 AM BST in January, and 10:00 AM BST in July.
When do working hours overlap between Greenwich and London?
In January: Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 5:00 PM GMT (9:00 AM to 5:00 PM BST). In July: Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 4:00 PM GMT (10:00 AM to 5:00 PM BST).