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Genealogy Bargains on Twitter: "GREGORIAN CALENDAR DAY ANNIVERSARY. 24 Feb 1582. Pope Gregory XIII ordered the correction of the Julian calendar. A change in the rule about leap years created the new
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Steve Berry - On October 15, 1582, Pope Gregory XIII introduced the Gregorian calendar. It was a refinement to the Julian calendar first implemented by Julius Caesar in 46 B.C. The Julian
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