When it is 9:00 AM AST, it is 1:00 PM GMT. Atlantic Standard Time (AST, UTC-4) and Greenwich Mean Time (GMT, UTC+0) are 4 hours apart.
| AST | GMT |
|---|---|
| 12:00 AM | 4:00 AM |
| 3:00 AM | 7:00 AM |
| 6:00 AM | 10:00 AM |
| 9:00 AM | 1:00 PM |
| 12:00 PM | 4:00 PM |
| 3:00 PM | 7:00 PM |
| 6:00 PM | 10:00 PM |
| 9:00 PM | 1:00 AM (+1 day) |
Atlantic Standard Time (AST) is UTC-4 and Greenwich Mean Time (GMT) is UTC+0. The exact difference can vary due to Daylight Saving Time changes. Our converter automatically accounts for current DST rules to give you accurate conversions.
Use the conversion table above to find common time mappings between AST and GMT. For precise conversions including DST adjustments, use the interactive converter.
Atlantic Standard Time (AST) is based on the America/Halifax timezone. DST observance depends on local regulations. Our converter automatically accounts for current DST rules.
Convert Atlantic Standard Time to Greenwich Mean Time
| AST | GMT |
|---|---|
| 12:00 AM | 4:00 AM (-1) |
| 3:00 AM | 7:00 AM |
| 6:00 AM | 10:00 AM |
| 9:00 AM | 1:00 PM |
| 12:00 PM | 4:00 PM |
| 3:00 PM | 7:00 PM |
| 6:00 PM | 10:00 PM |
| 9:00 PM | 1:00 AM (+1) |
Atlantic Standard Time (AST) is UTC-4 and Greenwich Mean Time (GMT) is UTC+0. The exact difference can vary due to Daylight Saving Time changes.
Use our converter above to find the exact time. Enter 9:00 in the AST field to see the corresponding GMT time, accounting for current DST rules.
Atlantic Standard Time (AST) is based on the America/Halifax timezone. DST observance depends on local regulations. Our converter automatically accounts for current DST rules.