What Seinfeld episode brought attention to "Festivus," the secular holiday created by Daniel O'Keefe?

Season nine, episode ten of Seinfeld, "The Strike," is based on author Daniel O'Keefe and the holiday he created called "Festivus." The classic episode includes the practices of "Airing of Grievances," "Feats of Strength," and the acknowledgment of "Festivus miracles".

Asked by Rachel Bortles · Last updated 5 years ago · 778 views · SOURCE