BST to AST converter

UK Time (London, Dublin, Lisbon) to Atlantic Time (Halifax).

BST12:07 AMSat 31 Oct 2026

→

AST9:07 PMFri 30 Oct 2026

AST is 3 h behind BST.

Pick a time in BST

⇄ AST to BST

9:00 AM BST = 6:00 AM AST same day

Best time to meet

The best time to meet is between 12:00 PM and 5:00 PM BST, which is 9:00 AM to 2:00 PM AST. Both sides are then inside 9 AM to 5 PM.

BST to AST time table

For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

BST	AST
12:00 AM BST	9:00 PM AST previous day
1:00 AM BST	10:00 PM AST previous day
2:00 AM BST	11:00 PM AST previous day
3:00 AM BST	12:00 AM AST
4:00 AM BST	1:00 AM AST
5:00 AM BST	2:00 AM AST
6:00 AM BST	3:00 AM AST
7:00 AM BST	4:00 AM AST
8:00 AM BST	5:00 AM AST
9:00 AM BST	6:00 AM AST
10:00 AM BST	7:00 AM AST
11:00 AM BST	8:00 AM AST
12:00 PM BST	9:00 AM AST
1:00 PM BST	10:00 AM AST
2:00 PM BST	11:00 AM AST
3:00 PM BST	12:00 PM AST
4:00 PM BST	1:00 PM AST
5:00 PM BST	2:00 PM AST
6:00 PM BST	3:00 PM AST
7:00 PM BST	4:00 PM AST
8:00 PM BST	5:00 PM AST
9:00 PM BST	6:00 PM AST
10:00 PM BST	7:00 PM AST
11:00 PM BST	8:00 PM AST

Quick answers

9:00 AM BST = 6:00 AM AST
12:00 PM BST = 9:00 AM AST
3:00 PM BST = 12:00 PM AST
5:00 PM BST = 2:00 PM AST
9:00 AM AST = 12:00 PM BST
12:00 PM AST = 3:00 PM BST
5:00 PM AST = 8:00 PM BST

Does the gap change during the year?

Yes, because of daylight saving. Until 1 Nov 2026: AST is 3 h behind BST. From 1 Nov 2026 to 14 Mar 2027: AST is 4 h behind BST. From 14 Mar 2027 to 28 Mar 2027: AST is 3 h behind BST. From 28 Mar 2027 to 31 Oct 2027: AST is 4 h behind BST. From 31 Oct 2027 to 7 Nov 2027: AST is 3 h behind BST.

BST next changes its clocks on 28 Mar 2027 (forward 1 h, to UTC+1), then on 31 Oct 2027 (back 1 h, to UTC+0). AST next changes its clocks on 1 Nov 2026 (back 1 h, to UTC−4), then on 14 Mar 2027 (forward 1 h, to UTC−3).

About BST and AST

BST here means UK Time, the clock in London, Dublin, Lisbon. Right now it is UTC+0. In winter the same clock is called GMT. This page follows the real clock all year.

AST here means Atlantic Time, the clock in Halifax. Right now it is UTC−3. Strictly, AST is the winter name; in summer these places use ADT. This page follows their real clock all year.

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