am.pm correct time writing format

A.M.= ante meridiem (before noon) morning? (0:00-12:00)

P.M.=post meridiem (=afternoon) p.m. copy (12:01-24:00)

The two are both attacked from Latin, both twelve-hour system. The time expressed is not the same? am morning pm afternoon.

1. am is the abbreviation for ante meridiem, which means from dawn to morning.

2. pm means before noon which is evening.

3. That's the overall difference, just the time frame.

Expanded information:

1. Time is a more abstract concept of the movement of matter, Changes in the continuity, sequential performance, time is a parameter used by mankind to describe the process of material movement or the process of events.

2, time is the Earth (other celestial bodies can also be theoretically) on all other objects (substances) three-dimensional movement (displacement) on the human senses to influence the formation of a quantity.

3, in twenty-four hours, the day begins at 24:00 ----1:00 in the morning, and the last minute of the day begins at 23:59 at the beginning of the night, and ends at 24:00 at the end of the night, and the last minute of the day ends at 24:00 at the end of the night, and the last minute of the day begins at 23:59 at the beginning of the night, and ends at 24:00 at the end of the night.

4. Due to the influence of traditional hand-operated clocks, most people use the 12-hour system to call and understand time in their daily lives. A system that uses the 12-hour system to display time usually displays noon as 12:00 pm and midnight as 12:00 am.