bissextus
[ bahy-seks-tuh s, bi- ]
/ baɪˈsɛks təs, bɪ- /
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.
Words nearby bissextus
bisphenoid,
bisphosphonate,
bisque,
bissau,
bissextile,
bissextus,
bisso,
bissonata,
bist,
bistable,
bistate