Learnig a.m. and p.m.

Learning Clock and Time in a.m. and p.m.
a.m. is ante meridiem which start from 12:01 midnight till 11:59 morning.
p.m. is post meridiem which start from 12:00 noon till 11:59 night.

http://www.youtube.com/watch?v=ZiF0fHPf9TM