Break out your D20s and your "New Mutants" collection!

It's "Embrace Your Geekness Day," and Wall Street embraced geeks by letting them ring the starting bell at the New York Stock Exchange on Tuesday morning. Those bellringers are also known as members of Best Buy's Geek Squad, who drive to the rescue of people trying to master the computers they bought from the store.

This embracing holiday is just one of a handful of geeky observances: "Darwin Day," "Pi Day," "Towel Day" (think "Hitchhiker's Guide to the Galaxy"), "Geek Pride Day." There's even a "Take Your Webmaster to Lunch Day."