Bissextus

What is Bissextus?

Bissextus definition and meaning on Dictionary terms:
noun
February 29th: the extra day added to the Julian calendar every fourth year (except those evenly divisible by 400, a rule introduced by the Gregorian calendar) to compensate for the approximately six hours a year by which the common year of 365 days falls short of the solar year.

 

reference: https://www.dictionary.com/browse/bissextus

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