+The **Gregorian Calendar** is the world's most widely adopted [civil calendar](/wiki/civil_calendar), reformed from the [Julian Calendar](/wiki/julian_calendar) in 1582 by Pope Gregory XIII. Its refined structure, particularly the [leap year](/wiki/leap_year) rule, ensures accurate tracking of the Earth's orbit and precise seasonal alignment.
+## See also
+- [Calendar](/wiki/calendar)
+- [Timekeeping](/wiki/timekeeping)
+- [Leap Year](/wiki/leap_year)
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