Why is it that morning called am & afternoon called pm?

Question

Why is it that morning called am & afternoon called pm?

Answer 1

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clock system

12-hour 24-hour

midnight

12:00 a.m.* 00:00

  1:00 a.m. 01:00

  2:00 a.m. 02:00

  3:00 a.m. 03:00

  4:00 a.m. 04:00

  5:00 a.m. 05:00

  6:00 a.m. 06:00

  7:00 a.m. 07:00

  8:00 a.m. 08:00

  9:00 a.m. 09:00

10:00 a.m. 10:00

11:00 a.m. 11:00

noon

12:00 p.m.* 12:00

  1:00 p.m. 13:00

  2:00 p.m. 14:00

  3:00 p.m. 15:00

  4:00 p.m. 16:00

  5:00 p.m. 17:00

  6:00 p.m. 18:00

  7:00 p.m. 19:00

  8:00 p.m. 20:00

  9:00 p.m. 21:00

10:00 p.m. 22:00

11:00 p.m. 23:00

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(midnight)* 24:00

* See section "Confusion

at noon and midnight"

The 12-hour clock is a timekeeping convention in which the 24 hours of the day are divided into two periods[1] called ante meridiem (a.m., Latin "before noon") and post meridiem (p.m., "after noon").[2] Each period consists of 12 hours numbered 12 (acting as zero), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. The indication of noon and midnight in the 12-hour system is disputed.

Answer 2

Two minutes in the penalty box for a non-hockey question.

Answer 3

Ante Meridiem, in 12-hour clock notation, Latin for "before noon" (also written A.M., a.m., and am)

Post meridiem (also written P.M., p.m., and pm), "after noon" in the 12-hour clock