Festivus, it's "the Festivus for the rest of us!"

Festivus is a parody holiday popularized by Seinfeld that is seen as a non-commercial alternative to Christmas.

The sitcom-inspired holiday is celebrated every year on December 23rd since it debuted on Seinfeld in 1997.

Some key features of Festivus are an aluminum pole in place of a Christmas tree, an annual 'airing of grievances' where everyone expresses their disappointment with each attendee and the world, and the feast of strength where the head of household challenges another to a wrestling match.

Here are some Twitter users celebrating the parody holiday: