Festivus is a secular holiday celebrated on December 23 as "another way" to celebrate the holiday season without participating in its pressures and commercialism. It was created by writer Dan O'Keefe and introduced into popular culture by his son Daniel, a screenwriter for the TV show Seinfeld, as part of a comical storyline on the show. The holiday's celebration, as shown on Seinfeld, includes an unadorned aluminum "Festivus pole," practices such as the "Airing of Grievances" and "Feats of Strength," and the labelling of easily explainable events as "Festivus miracles".
Celebrants of the holiday sometimes refer to it as "Festivus for the rest of us," a saying taken from the O'Keefe family traditions and popularized in the Seinfeld episode to describe Festivus' non-commerical aspect.
The name "Festivus" has also begun to be used as a general term for any type of December party not affiliated with the season's other events