Leap Year in Different Calendars
The Gregorian calendar, used by most western countries, recognizes an extra day at the end of February every four years except centenary years not divisible by 400.
However, some cultures use calendars that do not apply the same leap year rules as the Gregorian calendar.
Some calendars, such as the Iranian calendar, do not observe February 29 as a leap day. Other calendars, such as the Chinese calendar, add a leap month.
A few calendars that do not follow the conventional leap year model are listed below.
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- The Gregorian Calendar
- The Julian Calendar
- The Revised Julian Calendar
- The Mayan Calendar
- The Chinese Calendar
- The Roman Calendar
- Switch from Julian to Gregorian
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