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Subject: Re: 12-hour clock
 Duke Hillard (19p/+0r) Posted: Wednesday 13 Dec 2000
This post: 197 views, +0 rating
The two most widely used forms are "p.m." and "PM". The former case (p.m.) is preferred in formal writing as it follows the conventional form of Latin abbreviations (for example, i.e., e.g., and others). Where informal writing is acceptable, the latter instance (PM) is widely used as it's more easily typed or written (two fewer characters). In both forms, it's proper to use a space between numeric and alphabetic characters (12:01 a.m., and 12:01 AM). In informal usage, one might write 12:00 Noon, but is unlikely to write 12:00 NOON. In formal usage, one writes 12:00 p.m. Technically speaking, 12:00 a.m. on the 12-hour clock is equal to 00:00 on the 24-hour clock (the start of a new day). Common usage, though, considers Midnight Tuesday to equal Wednesday at 12:00 a.m. This is often a source of confusion. As a result, most businesses avoid the use of Midnight in contracts (for instance, my automobile coverage expires at 11:59 p.m. and transportation schedules typically list departures and arrivals shortly before or after Midnight rather than Midnight itself). On a related note, many users of the 24-hour clock seem unaware that the often used time of 24:00 does not exist (that is, 24:00 Tuesday is really 00:00 Wednesday). -- Duke Hillard, University Webmaster, UL Lafayette Stephen Turner wrote: > Maybe some kind American can help me with this 12-hour-clock localisation: > > 1) 1am or 1AM? We would always use lower case, but I think Americans > generally prefer upper case, right? > > 2) Midnight is 12am, not 12pm, right? (I find this very confusing. "Midnight > Wednesday" is always the time at the end of Wednesday. So that's 12am > Wednesday, or 12am Thursday, or what??) > > Thanks, > > -- > Stephen Turner http://www.statslab.cam.ac.uk/~sret1/ > Statistical Laboratory, Wilberforce Road, Cambridge, CB3 0WB, England > "The new operating system will recover more easily from system crashes." > (Microsoft, aiming high with Windows Millennium) > > > To unsubscribe from this > mailing list, send mail to analog-help-REQUEST@lists.isite.net > with "unsubscribe" in the main BODY OF THE MESSAGE. > >
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