On Thu, 14 Nov 2013 07:19:56 +0100 Jürgen Hestermann <[email protected]> wrote:
> Am 2013-11-13 19:42, schrieb Reimar Grabowski: > > 1 julian year = 365.25 days of 86400 SI seconds each. > > Of course there are lots of other definitions for year but if FPC uses the > julian one the value is exact and no approximation > > > So the difference between 2007-01-01 12:00 and 2008-01-01 12:00 ist *not* one > year? It is not one julian year. There is nothing like a year. As i said there are different definitions. If you talk about calendar year it's length changes and is therefor not a good measure of time and not used in science. > It's only 365,00 days and therefore not a full year according to your > definition. Correct. And this is not my definition it is the correct definition of a julian year and it is based on SI units. Time is measured in SI seconds. If you cannot express 'your year' as seconds it is not a unit of time. > But this it totaly wrong. Care to elaborate? Or is it just your gut feeling? > Same day same time of one year and the next should always be a one year > difference. According to what definition of year? Calendar year is a rather poor unit to measure time differences as it is not constant and cannot be expressed in seconds. R. -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
