December 23: HAPPY FESTIVUS!
According to the 12/18/1997 Seinfeld episode "The Strike," today, December 23rd, is FESTIVUS.
According to Frank Costanza, the holiday includes a Festivus dinner, an aluminum Festivus pole, practices such as the "Airing of Grievances" and "Feats of Strength", and easily explainable events called "Festivus miracles...