MST to AST Time Converter

When it's 12:00 PM MST, it's 3:00 PM AST 3 hours ahead

Convert Time

MST (Mountain Standard Time)
--:--:--
AST (Atlantic Standard Time)
--:--:--
= -- AST
Time in MSTTime in AST
12:00 AM3:00 AM
1:00 AM4:00 AM
2:00 AM5:00 AM
3:00 AM6:00 AM
4:00 AM7:00 AM
5:00 AM8:00 AM
6:00 AM9:00 AM
7:00 AM10:00 AM
8:00 AM11:00 AM
9:00 AM12:00 PM
10:00 AM1:00 PM
11:00 AM2:00 PM
12:00 PM3:00 PM
1:00 PM4:00 PM
2:00 PM5:00 PM
3:00 PM6:00 PM
4:00 PM7:00 PM
5:00 PM8:00 PM
6:00 PM9:00 PM
7:00 PM10:00 PM
8:00 PM11:00 PM
9:00 PM12:00 AM (+1 day)
10:00 PM1:00 AM (+1 day)
11:00 PM2:00 AM (+1 day)

Daylight Saving Time (DST) may affect this conversion. MST observes DST. AST does not observe DST.

Major Cities in MST (Mountain Standard Time)

  • Denver
  • El Paso
  • Albuquerque
  • Colorado Springs
  • Salt Lake City

Major Cities in AST (Atlantic Standard Time)

  • Halifax
  • Dartmouth
  • Lower Sackville
  • Charlottetown
  • Downtown Halifax
What is the time difference between MST and AST?

AST is 3 hours ahead compared to MST. When it's 12:00 PM (noon) in MST, it's 3:00 PM in AST.

Does Daylight Saving Time (DST) affect MST to AST conversion?

MST observes DST. AST does not observe DST. During DST transitions, the time difference may change by one hour.

What major cities use MST (Mountain Standard Time)?

Major cities in the MST timezone include Denver, El Paso, Albuquerque, Colorado Springs, Salt Lake City.

What is the best time to call from MST to AST?

The best time to call from MST to AST is between 9:00 AM and 5:00 PM MST, which is 12:00 PM to 8:00 PM AST. This ensures both parties are available during normal business hours (9 AM - 5 PM).