You're probably wondering, "What the heck is Yellow Pig Day?" Its origins date back to the 1960s when two math students at Princeton were given an assignment to analyze the properties of the number 17. Thinking about the number 17 for so long drove them a bit nuts, (as you can imagine), so they came up with the idea of a mythical yellow pig.

Oh yeah, and this yellow pig happened to have seventeen toes, seventeen teeth, seventeen eyelashes, etc. Now mathematicians in colleges and universities everywhere celebrate Yellow Pig Day by eating Yellow Pig Cake and singing Yellow Pig Carols (seriously, we couldn't make this stuff up).

This is not a holiday for weak imaginations, so let yours run wild. Have a Yellow Pig Parade and exchange Yellow Pig gifts. In honor of its founders, go out and find your own way to celebrate Yellow Pig Day!