AT to MST Conversion
View the AT to MST conversion below. Atlantic 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 Time is a blanket term used to describe multiple time zones including Atlantic Daylight Time (ADT) and Atlantic Standard Time (AST).
Atlantic Daylight Time
Atlantic Daylight Time or ADT has a UTC offset of - 3:00. This means that the time zone is 3 hours behind Coordinated Universal Time.... 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
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