AST to MST time converter
Mountain Time (MST) is 3 hours behind Atlantic Time (AST) all year round. Use the grid below to line up Halifax and Denver: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 06:43 ADT in Halifax and 03:43 MDT in Denver.
Tue, Oct 20
Halifax home
06:43
Tue, Oct 20 · UTC-3
Denver
03:43
Tue, Oct 20 · UTC-6
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
AST to MST: frequently asked
What is the time difference between AST and MST?
Mountain Time (MST) is 3 hours behind Atlantic Time (AST) all year round.
What time is 9 AM AST in MST?
9:00 AM AST is 6:00 AM MST.
When do working hours overlap between Halifax and Denver?
Both sides are within 9:00 AM–5:00 PM working hours between 12:00 PM and 5:00 PM AST (9:00 AM to 2:00 PM MST).