Mario's Birthday on September 13th.

Holy smokes, we can hardly believe it's already been 25 years since Super Mario Bros. first launched. The only plumber in the world more famous than Joe the Plumber, Super Mario was released in Japan on September 13, 1985.
Super Mario really needs no introduction. Even if you weren't born when Super Mario Bros. first shipped on the NES, you've probably either played a ROM version of the original (it runs 500 Wii points) or at least watched a speed run on YouTube. Since then, Super Mario has appeared in 473 million other titles, or so it seems.
What's your favorite Mario game of all time?

Image Credit: Kotaku