Bill Potts wrote in USMA 14670: >For the official position on these, please see >http://greenwichmeantime.com/info/noon.htm. > >Note the following, from that site, which contradicts the position stated by >Joe Reid: > > Every day starts precisely at midnight and > AM starts immediately after that point in time > e.g. 00:00:01 AM (see also leap seconds) > >The following site agrees with my initial point in USMA 14642 (as also does >the above site): > >http://www.boulder.nist.gov/timefreq/general/misc.htm These two references both duck the question by dividing the day into four parts: midnight, AM, noon, PM. Both agree that the day starts at midnight, and give preference, in 24-hour notation, to 00:00 rather than 24:00. I prefer to divide the day into AM and PM. The question is into which blocks should we put midnight and noon. JBR WFP, etc. -------------------------- -------------------------- 11.00 to 11.59 PM = 60 min 11:00 to 11:59 PM = 60 min 12:00 to 12:59 AM = 60 min 12:00 midnight = 1 min 12:01 to 12:59 AM = 59 min Same situation around noon. Joseph B. Reid 17 Glebe Road West Toronto M5P 1C8 Tel. 416 486-6071
