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