The Gregorian calendar is the calendar used in most of the worl...
wikipedia - 02 Jan 2023The Gregorian calendar is the calendar used in most of the world.[1] It was introduced in October 1582 by Pope Gregory XIII as a minor modification of the Julian calendar, reducing the average year from 365.25 days to 365.2425 days, and adjusting for the drift in the 'tropical' or 'solar' year that the inaccuracy had caused during the intervening centuries.
