4 hours behind BST
AST compared with BST, right now. Swap: AST to BST ⇄
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For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.
| BST | AST |
|---|---|
| 12:00 AM | 8:00 PM (previous day) |
| 1:00 AM | 9:00 PM (previous day) |
| 2:00 AM | 10:00 PM (previous day) |
| 3:00 AM | 11:00 PM (previous day) |
| 4:00 AM | 12:00 AM |
| 5:00 AM | 1:00 AM |
| 6:00 AM | 2:00 AM |
| 7:00 AM | 3:00 AM |
| 8:00 AM | 4:00 AM |
| 9:00 AM | 5:00 AM |
| 10:00 AM | 6:00 AM |
| 11:00 AM | 7:00 AM |
| 12:00 PM | 8:00 AM |
| 1:00 PM | 9:00 AM |
| 2:00 PM | 10:00 AM |
| 3:00 PM | 11:00 AM |
| 4:00 PM | 12:00 PM |
| 5:00 PM | 1:00 PM |
| 6:00 PM | 2:00 PM |
| 7:00 PM | 3:00 PM |
| 8:00 PM | 4:00 PM |
| 9:00 PM | 5:00 PM |
| 10:00 PM | 6:00 PM |
| 11:00 PM | 7:00 PM |
British Summer Time (BST). The United Kingdom from late March to late October (UTC+1). In winter the UK returns to GMT. BST is also sometimes used for Bangladesh Standard Time (UTC+6); this page means British time.
Sunday, March 28, 2027: clocks go forward 1 hour at 1:00 AM local time (UTC+0 → UTC+1).
Atlantic Time (AST/ADT). Nova Scotia, New Brunswick and Prince Edward Island (with daylight saving), plus Puerto Rico and much of the Caribbean, which stay on AST (UTC−4) all year.
Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).
The current difference is shown at the top of this page. BST uses Greenwich Mean Time (GMT, UTC+0) as standard time and British Summer Time (BST, UTC+1) during daylight saving time; AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) during daylight saving time. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.
On Tuesday, November 3, 2026, 9:00 AM in BST was 5:00 AM in AST. The conversion table above shows today’s values.
BST: Sunday, March 28, 2027: clocks go forward 1 hour at 1:00 AM local time (UTC+0 → UTC+1). AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).
British Summer Time does not use daylight saving time, so BST applies all year.
Convert any date, time and city · Meeting planner for three or more places