Festivus is a secular holiday occurring on December 23.
Festivus may also refer to: The Festivus, a seashell periodical Festivus Film Festival, a former film festival in Denver Mesonauta festivus, a species of South American cichlid fish
See also Festivus Maximus or Super Bowl XXXV "The Strike" (Seinfeld), the 1997 episode of Seinfeld that introduced the holiday