Julian, Coptic and Ethiopian Calendars
Since AD 8 the Julian calendar added, or will add, an extra day to February in years that are integer 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 vernal equinox year. This means that the vernal equinox moves a day earlier in the calendar about every 131 years.
Read more about this topic: Leap Year
Famous quotes containing the words ethiopian and/or calendars:
“Can the Ethiopian change his skin, or the leopard his spots? Then may ye also do good, that are accustomed to do evil.”
—Bible: Hebrew Jeremiah, 13:23.
“Tomorrow in the offices the year on the stamps will be altered;
Tomorrow new diaries consulted, new calendars stand;
With such small adjustments life will again move forward
Implicating us all; and the voice of the living be heard:
“It is to us that you should turn your straying attention;
Us who need you, and are affected by your fortune;
Us you should love and to whom you should give your word.””
—Philip Larkin (1922–1986)