How to use A.M. and P.M. properly

How often have you seen this type of statement?

The conference starts at 8:00 a.m. tomorrow morning.

The abbreviation a.m. stands for ante merdiem, which refers to the time of day between midnight and noon. In this case morning is unnecessary. Simply write:

The conference starts at 8:00 a.m. tomorrow.

In a similar manner, p.m. (post meridiem) refers to the afternoon. Do not include afternoon when you use the abbreviation.

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