AST to MST Converter
Atlantic Time
10:50:18 AM AST
Friday, November 13, 2026
3h
3h
Mountain Time
7:50:18 AM MST
Friday, November 13, 2026
Mountain Time (MST / MDT) is 3 hours behind Atlantic Time (AST / ADT).
Quick Reference
- Atlantic Time
- AST (GMT-4)
ADT starts on Mar 14, 2027
- Mountain Time
- MST (GMT-7)
MDT starts on Mar 14, 2027
Cities in AST
Cities in MST
Frequently Asked Questions
- What is the difference between AST and MST?
- MST is 3 hours behind AST.
- How do I convert AST to MST?
- To convert from AST to MST, subtract 3 hours. Use the interactive converter on this page to convert specific times.
- What cities are in AST and MST?
- Cities in AST include Halifax, Charlottetown. Cities in MST include Denver, Salt Lake City, Albuquerque, El Paso, Santa Fe.