December 23 isn’t just Christmas Eve Eve, it’s also Festivus. Festivus is an anti-commercialist holiday that was introduced to the world in the ninth season of “Seinfeld” in 1997.

Festivus was the brainchild of Seinfeld writer Dan O'Keefe, whose father invented a similar holiday including an Airing of Grievances and wrestling match in real life. One tradition that didn't ...