4 hours behind GMT
AST compared with GMT, right now. Swap: AST to GMT ⇄
Hour comparison appears when this page finishes loading.
For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.
| GMT | 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 |
Greenwich Mean Time (GMT). Equal to UTC for everyday use. The United Kingdom, Ireland, Portugal, Iceland and much of West Africa use GMT in winter or all year; the UK switches to BST (UTC+1) in summer.
No clock change is scheduled; the offset stays the same all year.
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. GMT uses Coordinated Universal Time (UTC, UTC+0) all year; 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 GMT was 5:00 AM in AST. The conversion table above shows today’s values.
GMT does not change its clocks. AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).
GMT is a fixed offset and never changes.
Convert any date, time and city · Meeting planner for three or more places