Every holiday season, jokes about airing your grievances and feats of strength pop up, but unless you?ve seen a certain episode of Seinfeld, you probably have no idea what?s going on. Well, December 23rd is Festivus, the festival ?for the rest of us,? and what originally started as a family in-joke has hopped from a beloved sitcom to a form of consumer rebellion. Festivus is all about family and friends. Sometimes too much about them. Festivus started as a family tradition with Seinfeld writer Dan O?Keefe: O?Keefe has related, over the years, that his father had little patience for the commercialism or religiousness of the traditional holidays.