AST to BST converter
BST is 4 hours ahead of AST today. AST (Atlantic Standard Time) - currently UTC−4; BST (British Summer Time) - currently UTC+0.
5 hours of the workday overlap: 9 AM-2 PM AST is 1 PM-6 PM BST. Quick answers: 9 AM AST = 1 PM BST, 12 PM AST = 4 PM BST, 5 PM AST = 9 PM BST.
Convert a time
BST
--:--
Working hours side by side
columns: AST hours PING · 09–18 local MAYBE · 07–09, 18–21 NOT NOW · 21–07Outlined: everyone can be pinged
AST to BST conversion table
| AST | BST | Verdict in BST |
|---|---|---|
| 12 AM · 00:00 | 4 AM · 04:00 | NOT NOW |
| 1 AM · 01:00 | 5 AM · 05:00 | NOT NOW |
| 2 AM · 02:00 | 6 AM · 06:00 | NOT NOW |
| 3 AM · 03:00 | 7 AM · 07:00 | MAYBE |
| 4 AM · 04:00 | 8 AM · 08:00 | MAYBE |
| 5 AM · 05:00 | 9 AM · 09:00 | PING |
| 6 AM · 06:00 | 10 AM · 10:00 | PING |
| 7 AM · 07:00 | 11 AM · 11:00 | PING |
| 8 AM · 08:00 | 12 PM · 12:00 | PING |
| 9 AM · 09:00 | 1 PM · 13:00 | PING |
| 10 AM · 10:00 | 2 PM · 14:00 | PING |
| 11 AM · 11:00 | 3 PM · 15:00 | PING |
| 12 PM · 12:00 | 4 PM · 16:00 | PING |
| 1 PM · 13:00 | 5 PM · 17:00 | PING |
| 2 PM · 14:00 | 6 PM · 18:00 | MAYBE |
| 3 PM · 15:00 | 7 PM · 19:00 | MAYBE |
| 4 PM · 16:00 | 8 PM · 20:00 | MAYBE |
| 5 PM · 17:00 | 9 PM · 21:00 | NOT NOW |
| 6 PM · 18:00 | 10 PM · 22:00 | NOT NOW |
| 7 PM · 19:00 | 11 PM · 23:00 | NOT NOW |
| 8 PM · 20:00 | 12 AM · 00:00 (next day) | NOT NOW |
| 9 PM · 21:00 | 1 AM · 01:00 (next day) | NOT NOW |
| 10 PM · 22:00 | 2 AM · 02:00 (next day) | NOT NOW |
| 11 PM · 23:00 | 3 AM · 03:00 (next day) | NOT NOW |
Cities on AST
America/HalifaxCities on BST
Europe/LondonOther conversions
All convertersQuestions
What is the time difference between AST and BST?
BST (British Summer Time) is 4 hours ahead of AST (Atlantic Standard Time) right now: UTC−4 versus UTC+0.
What is 9 AM AST in BST?
9:00 AM AST is 1 PM BST.
What is 5 PM AST in BST?
5:00 PM AST is 9 PM BST.
Does daylight saving change the AST–BST difference?
Halifax switches between AST; next change Sunday, 14 March 2027 (UTC−4 → UTC−3). London switches between BST; next change Sunday, 28 March 2027 (UTC+0 → UTC+1).