MeanwhileMST to AST converter
Mountain Time (Denver, Salt Lake City, Calgary) to Atlantic Time (Halifax).
AST is 3 h ahead of MST.
9:00 AM MST = 12:00 PM AST same day
Best time to meet
The best time to meet is between 9:00 AM and 2:00 PM MST, which is 12:00 PM to 5:00 PM AST. Both sides are then inside 9 AM to 5 PM.
MST to AST time table
For 30 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| MST | AST |
|---|---|
| 12:00 AM MST | 3:00 AM AST |
| 1:00 AM MST | 4:00 AM AST |
| 2:00 AM MST | 5:00 AM AST |
| 3:00 AM MST | 6:00 AM AST |
| 4:00 AM MST | 7:00 AM AST |
| 5:00 AM MST | 8:00 AM AST |
| 6:00 AM MST | 9:00 AM AST |
| 7:00 AM MST | 10:00 AM AST |
| 8:00 AM MST | 11:00 AM AST |
| 9:00 AM MST | 12:00 PM AST |
| 10:00 AM MST | 1:00 PM AST |
| 11:00 AM MST | 2:00 PM AST |
| 12:00 PM MST | 3:00 PM AST |
| 1:00 PM MST | 4:00 PM AST |
| 2:00 PM MST | 5:00 PM AST |
| 3:00 PM MST | 6:00 PM AST |
| 4:00 PM MST | 7:00 PM AST |
| 5:00 PM MST | 8:00 PM AST |
| 6:00 PM MST | 9:00 PM AST |
| 7:00 PM MST | 10:00 PM AST |
| 8:00 PM MST | 11:00 PM AST |
| 9:00 PM MST | 12:00 AM AST next day |
| 10:00 PM MST | 1:00 AM AST next day |
| 11:00 PM MST | 2:00 AM AST next day |
Quick answers
- 9:00 AM MST = 12:00 PM AST
- 12:00 PM MST = 3:00 PM AST
- 3:00 PM MST = 6:00 PM AST
- 5:00 PM MST = 8:00 PM AST
- 9:00 AM AST = 6:00 AM MST
- 12:00 PM AST = 9:00 AM MST
- 5:00 PM AST = 2:00 PM MST
Does the gap change during the year?
Yes, because of daylight saving. Until 31 Oct 2026: AST is 3 h ahead of MST. From 31 Oct 2026 to 1 Nov 2026: AST is 2 h ahead of MST. From 1 Nov 2026 to 13 Mar 2027: AST is 3 h ahead of MST. From 13 Mar 2027 to 14 Mar 2027: AST is 4 h ahead of MST. From 14 Mar 2027 to 6 Nov 2027: AST is 3 h ahead of MST.
MST next changes its clocks on 1 Nov 2026 (back 1 h, to UTC−7), then on 14 Mar 2027 (forward 1 h, to UTC−6). 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).
About MST and AST
MST here means Mountain Time, the clock in Denver, Salt Lake City, Calgary. Right now it is UTC−6. Strictly, MST is the winter name; in summer these places use MDT. This page follows their real clock all year.
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.
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