BST to AST time converter
Atlantic Time (AST) is 4 hours behind British Time (BST) all year round. Use the grid below to line up London and Halifax: 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 06:43 ADT in Halifax.
Tue, Oct 20
London home
10:43
Tue, Oct 20 · UTC+1
Halifax
06:43
Tue, Oct 20 · UTC-3
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
BST to AST: frequently asked
What is the time difference between BST and AST?
Atlantic Time (AST) is 4 hours behind British Time (BST) all year round.
What time is 9 AM BST in AST?
9:00 AM BST is 5:00 AM AST.
When do working hours overlap between London and Halifax?
Both sides are within 9:00 AM–5:00 PM working hours between 1:00 PM and 5:00 PM BST (9:00 AM to 1:00 PM AST).