It's Talk Like A Pirate Day but I have no enthusiasm for it anymore. After several years, pirates just aren't that funny anymore. I think they ran their course.
Now zombies on the other hand, now you're talking. As of summer 2005, zombies are the new pirates. Someone needs to start a "Eat Brains Like a Zombie Day" to replace this pirate one. A passing of the meme torch, if you will.