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Description:
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On the 4th October 1582, Pope Gregory XIII implemented the Gregorian calendar. Although this calendar is now the most widely used calendar in the world, it was initially only adopted by the Catholic Church and the Papal States since to become a nation’s official calendar it had to be approved by the civil authorities. The only areas to therefore implement it on the specified date were the territories governed by Philip II of Spain, the Polish–Lithuanian Commonwealth, and the Papal States.
Due to a drift between the Julian calendar, the lunar calendar, and the real moon, the date on which ... |