Bissextus – A new word… February 29, 2016 / Robin Definitions for bissextus February 29th: the extra day added to the Julian calendar every fourth year (except those evenly divisible by 400) to compensate for the approximately six hours a year by which the common year of 365 days falls short of the solar year. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)MoreClick to share on Pocket (Opens in new window)Like this:Like Loading... Related