The '''Gregorian calendar''' is the most widely used calendar in the world today. It was first proposed by the Calabrian doctor [[Aloysius Lilius]], and decreed by [[Pope Gregory XIII]], after whom it was named, on 24 February 1582 by papal bull ''[[Inter gravissimas]]''. It is a reform of the [[Julian calendar]]. | The '''Gregorian calendar''' is the most widely used calendar in the world today. It was first proposed by the Calabrian doctor [[Aloysius Lilius]], and decreed by [[Pope Gregory XIII]], after whom it was named, on 24 February 1582 by papal bull ''[[Inter gravissimas]]''. It is a reform of the [[Julian calendar]]. |