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Meaning of AM and PM

Am and pm is a time format that is used to distinguish day and night in a single day. This format is commonly used in the United States and Europe. In Indonesia, the time format is not used because it only uses 24-hour time format. As we know that the conventional matter of hours until the number is only 12, whereas in one day has 24 hours. To distinguish divided into two periods, namely 12 noon and 12 o'clock at night.

1. a.m stands for "ante meridiem" which means before noon.
    am starting from 12.00 pm until the hour of the day or before 11:59 noon.

2. pm stands for post meridiem meaning after noon 
    pm starts from 12.00 noon until 11:59 hours the night or after noon.


Example:

1. 06.00 o'clock = 6:00 a.m.
2. 17.00 o'clock = 3:00 p.m.
3. 11.00 o'clock = 11:00 a.m.
4. 14.00 o'clock = 2:00 p.m.
5. 16.00 o'clock = 4:00 p.m
6. 19.00 o'clock = 7:00 p.m.
7. 21,00 o'clock = 9:00 p.m.
8. 07.00 o'clock = 7:00 a.m.
9. 09.00 o'clock = 9:00 a.m
10. 10.00 o'clock = 10:00 a.m