Leap Year in Other 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.

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Some calendars, such as the Iranian calendar, do not observe February 29 as a leap day. Other calendars, such as the Chinese calendar, recognize a leap month. A few calendars that do not follow the conventional leap year model are listed below.

• Chinese Leap Year
• Jewish Leap Year
• Iranian Leap Year
• Hindu Leap Year
• Islamic Leap Year
• Bahá'í Leap Year
• Ethiopian Leap Year