What do AM and PM mean in time notation?

Atul

Member
I often see times written with AM and PM but I'm not sure what they stand for or how they work. Can someone explain the difference and when each is used?
 
AM means “Ante Meridiem,” Latin for “before midday.”
PM
means “Post Meridiem,” Latin for “after midday.”


So, AM refers to the hours midnight to noon, and PM refers to noon to midnight.
 
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