Is December 31 A Holiday Festivus is a secular holiday celebrated on December 23 as an alternative to the pressures and commercialism of the Christmas season. Originally a family tradition of scriptwriter Dan O’Keefe, who worked on the American sitcom Seinfeld, Festivus entered popular culture after it was made the focus of the 1997 episode "The Strike". The non-commercial holiday’s The University of Dayton will cut ties with ‚ÄúDayton 2…