From: Peter L. <pet...@te...> - 2008-02-20 17:24:00
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Well, it acually changed three times: Julian up to 1699-12-31 Swedish 1700-01-01 -> 1712-02-30 followed by Julian 1712-03-01 -> 1753-02-17 followed by Gregorian 1753-03-01 -> now The Swedish calender was supposed to work 1700-01-01 - 1740-02-28 by skipping 11 leapyears and then be in phase with the Gregorian. As this was a period of war, many thing did not work as planned. The leapyears 1704 and 1708 were not skipped. So by 1712 the Swedish calender was one day ahead of the Julian and 10 days behind the Gregorian. The king, Charles XII, decided to go back to Julian by 1712-03-01 and did this by adding 1712-02-30! The final result of all this was that there are som nonexisting dates: 1700-02-29 and 1753-02-18 -> 1753-02-28 and one unique date: 1712-02-30. I don't think it's neccesary to do anything about this. Maybe check for those nonexisting/unique dates above? Julian was called "Old Style" and Gregorian "New Style" in order to avoid references to popes! /Peter > 2008/2/19, Eero Tamminen <ee...@us...>: > > Hi, > > > > On Monday 18 February 2008, Benny Malengier wrote: > > > perhaps you can give Peter some hints. > > > Do you eg mean a new calander should be introduced: 'Swedish > > > pre-Gregorian' which would be Julian, a bit of Gregorian, then Julian > > > again? Swedish could then use Julian for dates before the first change, > > > then Swedish pre--Gregorian untill the final real switch. > > > > Different countries have adopted Gregorian calendar at different times, > > see: > > http://en.wikipedia.org/wiki/Gregorian_calendar#Adoption > > As I understand it, the problem is not the moment of switching, but the > fact that Sweden switched twice, once with not good results and strange > date like 30 feb as a consequence. If there is only or Gregorian, or pure > Julian, the present calendars in GRAMPS are ok. > > Benny > > - Eero -- Peter Landgren Talken Hagen 671 94 Brunskog SWEDEN 0570-530 21 070-635 4719 pet...@te... skype:pgl4820.2 |