AM

Morning (after midnight)

The abbreviation “AM” stands for “ante meridiem”, a Latin term meaning “before midday” or “before noon”. It refers to the time from midnight (12:00 AM) to just before noon (11:59 AM). The counterpart, “PM”, stands for “post meridiem”, meaning “after midday”, which covers the period from noon to just before midnight. These terms have been used in timekeeping systems for centuries, originating from the Roman practice of dividing the day into two 12-hour periods.