Whether it's because of it's superstitious origins, or whether because there was that little film franchise with the same name, Friday the 13th's are always good for horror fans.
So in the spirit of the day, here's a little gem for you I've seen floating around the net.
Click on the image to get the full size background.
And of course, what better movie to watch than the film that started it all!
And finally, just 'cause, here are 13 of the big guys finest kills all in one video