Julian, Coptic and Ethiopian calendars::Leap year


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Julian, Coptic and Ethiopian calendars From AD 8 the Julian calendar received an extra day added to February in years that are multiples of 4.

The Coptic calendar and Ethiopian calendar also add an extra day to the end of the year once every four years before a Julian 29-day February.

This rule gives an average year length of 365.25 days. However, it is 11 minutes longer than a tropical year. This means that the vernal equinox moves a day earlier in the calendar about every 131 years.

Leap year sections
Intro  Gregorian calendar  Julian, Coptic and Ethiopian calendars  Revised Julian calendar  Chinese calendar  Islamic calendar  Hindu calendar  Solar Hejri calendar  Folk traditions  Birthdays  See also  References  External links  

Julian, Coptic and Ethiopian calendars
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