题目

AM、PM是上午和下午的英文缩写,请问它们的完整单词是什么?

提问时间：2020-07-18

答案

This is incorrect:
AM：after midnight
PM：prior to midnight
It is:
AM:ante meridiem (before noon)
PM:post meridiem.(after noon)
These words come from Latin (拉丁语)
ante = prior to,before
post = after
meridiem = noon
note:12 am = midnight,12 pm = noon
However it is often better to use midnight or noon to be clear in this case.
In my high school English textbook it said that you could write 12 m for noon,however I have never seen it used.