Telling Time: A.M. and P.M.Date: 10/30/2001 at 20:21:56 From: Gabrielle Rivera Subject: Telling time What do the a.m. and the p.m. mean in time? Date: 10/31/2001 at 17:06:01 From: Doctor Sarah Subject: Re: Telling time Hi Gabrielle - thanks for writing to Dr. Math. A.M. = ante meridiem P.M. = post meridiem They're from the Latin: ante = before post = after meridiem = noon The American Heritage Dictionary online says that: "By definition, 12 a.m. denotes midnight, and 12 p.m. denotes noon, but there is sufficient confusion over these uses to make it advisable to use 12 noon and 12 midnight where clarity is required." - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
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