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Talk:Last Friday of each month: Difference between revisions
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→1582: hybrid calendars (?), daylight savings, proleptic calendars, end-of-use clauses. -- ~~~~
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GregorianCalendar is a hybrid calendar that supports both the Julian and Gregorian calendar systems with the support of a single discontinuity, which corresponds by default to the Gregorian date when the Gregorian calendar was instituted (October 15, 1582 in some countries, later in others).
:::I think that means it's Julian before 10/15/1582 and Gregorian thereafter (and you can set the cutover date if you want). Honestly I have no idea what's going on with any of this. I think it's kind of a waste since the calendar change was so long ago. Seems sort of impractical to worry about it now. --[[User:Mwn3d|Mwn3d]] 17:57, 11 August 2012 (UTC)
:::: The Gregorian Calendar isn't a hyrid calendar --- which is contrary to (I assume) some Java document --- one should refer to the (I can't believe I'm saying this) Vatican papers about it's description, rules, and implementation). Failing that, one could just check the bureau of weights and measurements, division of measurement standards, or whatever ... for the country you're in. It is proleptic (both in it's inception and use) and there is no discontinuity. [Nothing is really simple, the more you know about something, the more detail there is that you don't want to neccessarily know or care about]. The only point of interest is when states/countries switched over from the (whatever) older calendar(s) [in most cases, a Julian calendar] to the Gregorian calendar, and that switchover caused "missing days" when the new calendar was adopted and the old calendar was dropped. The pratical side to this is when referring to specific dates, such as (USA president) George Washington's birthday (some of old fogies still remember when GW's birthday was celebrated on the ''O.S.'' birthdate ... and then later came President's Day. The pratical side of the changeover didn't really effect many people (or contracts), there was no driver's licenses to worry about, no retirements kicking in (Social Security was a long, long way off), I suppose there was a handful of people who suddenly become over the age of consent for marriage, property ownership, inheritance, impressment, and other ... stuff, the most important was the ability to buy beer, of course, of course. The adoption of a new/different calendar (with different leapyear rules, and now, leapsecond rules) isn't a simple thing, otherwise it wouldn't have been resisted for so long by many states/countries, and, not supprising, politics/religion/posturing played a big role in this. We still squabble (a very polite term) over daylight savings times, and you won't believe the (USA) laws around the use (or not) of it --- on how they effect labor (time worked vs. time passed), 24/7 time of contracts, end-of-use clauses, a whole host of incidentals. -- [[User:Gerard Schildberger|Gerard Schildberger]] 19:10, 11 August 2012 (UTC)
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