MeanwhileAST to GMT converter
Atlantic Time (Halifax) to Greenwich Mean Time (the same as UTC, all year).
GMT is 3 h ahead of AST.
9:00 AM AST = 12:00 PM GMT same day
Best time to meet
The best time to meet is between 9:00 AM and 2:00 PM AST, which is 12:00 PM to 5:00 PM GMT. Both sides are then inside 9 AM to 5 PM.
AST to GMT time table
For 30 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| AST | GMT |
|---|---|
| 12:00 AM AST | 3:00 AM GMT |
| 1:00 AM AST | 4:00 AM GMT |
| 2:00 AM AST | 5:00 AM GMT |
| 3:00 AM AST | 6:00 AM GMT |
| 4:00 AM AST | 7:00 AM GMT |
| 5:00 AM AST | 8:00 AM GMT |
| 6:00 AM AST | 9:00 AM GMT |
| 7:00 AM AST | 10:00 AM GMT |
| 8:00 AM AST | 11:00 AM GMT |
| 9:00 AM AST | 12:00 PM GMT |
| 10:00 AM AST | 1:00 PM GMT |
| 11:00 AM AST | 2:00 PM GMT |
| 12:00 PM AST | 3:00 PM GMT |
| 1:00 PM AST | 4:00 PM GMT |
| 2:00 PM AST | 5:00 PM GMT |
| 3:00 PM AST | 6:00 PM GMT |
| 4:00 PM AST | 7:00 PM GMT |
| 5:00 PM AST | 8:00 PM GMT |
| 6:00 PM AST | 9:00 PM GMT |
| 7:00 PM AST | 10:00 PM GMT |
| 8:00 PM AST | 11:00 PM GMT |
| 9:00 PM AST | 12:00 AM GMT next day |
| 10:00 PM AST | 1:00 AM GMT next day |
| 11:00 PM AST | 2:00 AM GMT next day |
Quick answers
- 9:00 AM AST = 12:00 PM GMT
- 12:00 PM AST = 3:00 PM GMT
- 3:00 PM AST = 6:00 PM GMT
- 5:00 PM AST = 8:00 PM GMT
- 9:00 AM GMT = 6:00 AM AST
- 12:00 PM GMT = 9:00 AM AST
- 5:00 PM GMT = 2:00 PM AST
Does the gap change during the year?
Yes, because of daylight saving. Until 1 Nov 2026: GMT is 3 h ahead of AST. From 1 Nov 2026 to 14 Mar 2027: GMT is 4 h ahead of AST. From 14 Mar 2027 to 7 Nov 2027: GMT is 3 h ahead of AST.
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). GMT does not change its clocks.
About AST and GMT
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.
GMT here means Greenwich Mean Time, the clock in the same as UTC, all year. Right now it is UTC+0. It has no daylight saving.
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Coming soonMore conversions
AST to EST AST to CST AST to MST AST to PST AST to AKST AST to HST AST to NST AST to BRT AST to ART AST to COT AST to CLT AST to UTC AST to BST AST to CET AST to EET AST to MSK AST to TRT AST to SAST AST to WAT AST to EAT AST to GST AST to IRST AST to AFT AST to PKT AST to IST AST to NPT AST to BDT AST to ICT AST to WIB AST to SGT AST to HKT AST to PHT AST to KST AST to JST AST to AWST AST to ACST AST to AEST AST to NZST