Changes

The Gregorian calendar system dropped 10 days to bring the calendar back into synchronization with the seasons and, to keep it there, adopted the following [[leap year]] rule:

The Gregorian calendar system dropped 10 days to bring the calendar back into synchronization with the seasons and, to keep it there, adopted the following [[leap year]] rule:

namely, "Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100; the centurial years that are exactly divisible by 400 are still leap years. For example, the year 1900 was not a leap year; the year 2000 was a leap year."[http://aa.usno.navy.mil/faq/docs/calendars.php].  In the Julian calendar, ''all'' years exactly divisible by 4 are leap years.[http://en.wikipedia.org/wiki/Gregorian_calendar]

namely, "Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100; the centurial years that are exactly divisible by 400 are still leap years. For example, the year 1900 was not a leap year; the year 2000 was a leap year."[https://aa.usno.navy.mil/faq/docs/calendars.php].  In the Julian calendar, ''all'' years exactly divisible by 4 are leap years.[https://en.wikipedia.org/wiki/Gregorian_calendar]

[[Category: General Reference]]

[[Category: General Reference]]

[[Category: Astronomy]]

[[Category: Astronomy]]