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 ```sometimes twelve noon is written 12pm. Is this correct? Is this an acceptable convention? Is twelve midnight then 12 am?```
 ```Hi puffin1932: Thanks for the interesting question. The short answer to your question is that, yes, the accepted convention is that 12 noon is written as "12 p.m." and 12 midnight is written as "12 a.m.". However, the following websites list reasons why the whole a.m./p.m. thing is not really the "factual" way to go with midnight/noon. Midnight and Noon URL: http://www.astronomy.net/articles/13/ Quote: "While the sun is to the east of this meridian, it is morning. So a.m. is an abbreviation for antemeridian or before mid-day. After the sun has crossed the meridian, it is after mid-day or afternoon. So p.m. is the abbreviation for post meridian or after midday or afternoon. Hence to express the time from 12 noon to 12 o'clock at night, we use the term p.m. and from 12 o'clock at night to 12 o'clock noon we use a.m. However 12 o'clock midday is neither ante meridian or post meridian. It is simply 12 Noon." 12 PM .com - Noon or Midnight? URL: http://www.12pm.com/ Quote: ""Technically speaking," neither noon nor midnight can be a.m. or p.m. 'Technically speaking' you are correct -- noon is not post meridian -- it IS meridian. However, since 12:00:01 is post meridian (or 12:00:00.01, for that matter), it makes more sense to say that 12:00:00 is post meridian for consistency's sake (or else you would have both PM and AM in the same 12 o'clock hour). Similarly midnight could be classified as BOTH PM and AM, because it is equidistant from the meridian. But classifying it as PM would produce the same confusion (i.e., 12:00 PM followed by 12:01 AM)." Search Strategy (on Google): * noon "12 pm" I hope this helps. websearcher```