Festivus

Etymology
Coined by Daniel O'Keefe and popularized on the TV series Seinfeld; either borrowed from or else derived from its English descendants  and  by adding the Latin suffix.

Proper noun

 * 1) A nondenominational holiday featured in a Seinfeld episode, now celebrated (seriously or otherwise) on December 23rd.
 * 2) * 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."
 * 1) * 2005, Allen Salkin, Gabi Payn (Illustrator) “Festivus: The Holiday for the Rest of Us”