Noon is 12:00 pm in the 12-hour clock, because one minute after noon is 12:01 pm. It would be totally weird to go from 12:00 am to 12:01 pm.
Midnight is 12:00 am in the 12-hour clock, because the day begins at midnight, and one minute after midnight is 12:01 am. Likewise, it would be totally weird to go from 12:00 pm to 12:01 am. The last minute of the previous day is 2359 in the 24-hour clock and 11:59 pm in the 12-hour clock. In the USA, railroads never had anything depart at noon or midnight - too many chances for confusion and error. It was always "12:01 am" or "12:01 pm". Most railroads now dispatch in the 24-hour clock for this reason; there is no ambiguity over 0000 and 1200. (But public railroad timetables in the USA are still dumbed-down to the 12-hour clock for the public.) Although tolerated, 2400 should never be used because there is no 2401. Carleton -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Predrag Lezaic Sent: Thursday, January 01, 2004 12:43 To: U.S. Metric Association Subject: [USMA:28060] RE: Calendar, date and time So is 12:00 Noon - 12 AM or 12 PM? I constantly have problems with using this format on websites that use calendars. Predrag >I have the same problem as you with people who refer to 24-hour time as >military time. However, I have difficulty believing you don't know what >noon is.
