Definition from Wiktionary, the free dictionary
See also: festivus
- A nondenominational holiday featured in a Seinfeld episode, now celebrated (seriously or otherwise) on December 23rd.
- 2006, Boston Globe Article- “Yes, Virginia, there is a Festivus” 
- "Festivus isn't about any specific religion," Doyle said, stating what seemed both obvious and reassuring. "It's inclusive. And funny."
- 2005, Allen Salkin, Gabi Payn (Illustrator) “Festivus: The Holiday for the Rest of Us”
- 2006, Boston Globe Article- “Yes, Virginia, there is a Festivus”