Take the tour ×  What do a.m. and p.m. stand for when talking
about time?  share|improve this question I think this is easily
answered by resources such as wikipedia. –  JYelton Apr 5 '11 at
21:35 add comment  closed as off topic by Jeff Atwood Apr 12 '11
at 7:03   1 Answer  up vote 11 down vote accepted  They are from
the Latin for ante meridiem and post meridiem, which mean
"before noon" and after noon", respectively.  share|improve this
answer It is worth mentioning the crazy gotcha involving 12am
and 12pm. 12pm means noon and 12:30pm is the half hour after
noon. 12am means midnight. Many, many, many people get this
incorrect. –  MrHen Apr 5 '11 at 20:36 @MrHen; The confusion is
usually caused by the fact that 11am is directly followed by
12pm, or 12pm is directly followed by 1pm, rather than that
12:30pm follows 12:00pm. But otherwise you're correct, it's a
common mistake. :) –  roe Apr 5 '11 at 20:56 @all: Probably
flirting with off-topicism here (I only got here from a link on
Discussion re trivial ques