In case someone gave you a fruitcake for Christmas, as a joke or otherwise.
How to Celebrate? Collect all the fruitcake you can. Find an empty space, and start tossing your fruitcakes. Feeling competitive? Compete for the highest or farthest throw.
Here's video of the 2013 event in Manitou Springs, Colorado, where it's thought that this holiday was first created and celebrated in 1995. This occurrence included trebuchets, catapults, air cannons, and giant sling shots:
The classic drunken fruitcake recipe (Check the whiskey. Pour 1 level cup and drink. Repeat.)
15 Fun Facts About Fruitcake.