Who Introduced The Gregorian Calendar

Who Introduced The Gregorian Calendar. (this included all territories then ruled by great britain, including large parts of what is now canada and the united states.) Named after pope gregory xiii, who introduced it, the gregorian calendar was created to reform the julian calendar, which had been in use since its introduction by julius caesar in 46 bce.

Pope gregory xiii issued a papal bull, inter gravissimus on february 24, 1582 that established the gregorian calendar as the new and official calendar of the catholic world. The gregorian calendar was introduced in 1582 by pope gregory xiii by reforming julian calendar.