I recommend not to open this up for 6.0.0 core. Calendar conversion is easy to do in a module, and the Date class has an absolute day count, which is really all you need everything for an intermediate representation. It wouldn't be hard to port Calendrica, for instance.
Also, the difference between the secular and religious calendars in Russia is not fixed. It's currently 13 days, but only since 1900, before which it was 12 days, and after 2100 it will be 14 days. Calendar conversion can be tricky - which is another reason to leave it out of core. IMO. On Wednesday, April 21, 2010, Matthew <rnd...@gmail.com> wrote: > I whole-heartedly agree that we need to make a system independent of any sort > of time measurement system. I think the conclusion reached on IRC was that > most of the world uses or is at least familiar with the Gregorian system. > > Now, I can't help but think how we would define an Instant. The best > (reasonable) choice is something like TAI or Unix Epoch (I could argue that > seconds are not independent, but don't trust me; I'd suggest tapping into the > cosmic timeline :) ). I also hope there aren't going to be any leap Instants. > (the filter should take care of leaping, after all the calendar has an issue > with leaping.) > > If there isn't a standard defining how many seconds are in a year (i.e. as > defined by TAI or the metric system or some other international standard), I > propose it'd be about 365.25 Gregorian days (although I'd much prefer an > international standard to my Indo-European ways :) ). > > Overall, I think you have a great idea. As long as the filters are > implemented simply, I think it will prove to be the best option. > > -- > Don't Panic! > > -- Mark J. Reed <markjr...@gmail.com>
