AST to MST Time Converter

When it's 12:00 PM AST, it's 9:00 AM MST 3 hours behind

Convert Time

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

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

Major Cities in AST (Atlantic Standard Time)

  • Halifax
  • Dartmouth
  • Lower Sackville
  • Charlottetown
  • Downtown Halifax

Major Cities in MST (Mountain Standard Time)

  • Denver
  • El Paso
  • Albuquerque
  • Colorado Springs
  • Salt Lake City
What is the time difference between AST and MST?

MST is 3 hours behind compared to AST. When it's 12:00 PM (noon) in AST, it's 9:00 AM in MST.

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

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

What major cities use AST (Atlantic Standard Time)?

Major cities in the AST timezone include Halifax, Dartmouth, Lower Sackville, Charlottetown, Downtown Halifax.

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

The best time to call from AST to MST is between 9:00 AM and 5:00 PM AST, which is 6:00 AM to 2:00 PM MST. This ensures both parties are available during normal business hours (9 AM - 5 PM).