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AST to MST Conversion

View the AST to MST conversion below. Atlantic Standard Time is 3 hours ahead of Mountain Standard Time. Convert more time zones by visiting the time zone page and clicking on common time zone conversions. Or use the form at the bottom of this page for easy conversion.

Atlantic Standard Time

Atlantic Standard Time or AST has a UTC offset of - 4:00. This means that the time zone is 4 hours behind Coordinated Universal Time. The time zone is primarily observed by areas of North America, and the Caribbean during the winter months when Daylight Saving is inactive. As soon as Daylight Saving... read more

Mountain Standard Time

Mountain Standard Time is seven hours behind the Coordinated Universal Time standard, written as an offset of UTC - 7:00. That means to find the standard time in the zone you must subtract seven hours from Coordinated Universal Time. Territories observing the time zone are primarily in North Americ... read more

  Day     Morning/Evening     Night  
ASTMST
 12:00 AM in AST is   09:00 PM in MST 
 01:00 AM in AST is   10:00 PM in MST 
 02:00 AM in AST is   11:00 PM in MST 
 03:00 AM in AST is   12:00 AM in MST 
 04:00 AM in AST is   01:00 AM in MST 
 05:00 AM in AST is   02:00 AM in MST 
 06:00 AM in AST is   03:00 AM in MST 
 07:00 AM in AST is   04:00 AM in MST 
 08:00 AM in AST is   05:00 AM in MST 
 09:00 AM in AST is   06:00 AM in MST 
 10:00 AM in AST is   07:00 AM in MST 
 11:00 AM in AST is   08:00 AM in MST 
 12:00 PM in AST is   09:00 AM in MST 
 01:00 PM in AST is   10:00 AM in MST 
 02:00 PM in AST is   11:00 AM in MST 
 03:00 PM in AST is   12:00 PM in MST 
 04:00 PM in AST is   01:00 PM in MST 
 05:00 PM in AST is   02:00 PM in MST 
 06:00 PM in AST is   03:00 PM in MST 
 07:00 PM in AST is   04:00 PM in MST 
 08:00 PM in AST is   05:00 PM in MST 
 09:00 PM in AST is   06:00 PM in MST 
 10:00 PM in AST is   07:00 PM in MST 
 11:00 PM in AST is   08:00 PM in MST 
 12:00 AM in AST is   09:00 PM in MST 

A * indicates that daylight saving time (DST) is being observed


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