It's a real day. It even has an official website.
We did have kids dress up for this day. Not a lot, but the history club also held a special meeting. I'm sure it involved students going, "Arrrr!" and "Gar!" (a la Steve the Pirate from Dodgeball) a lot.
Here's one of my favorite pictures from the actual Flickr Talk Like a Pirate Day photostream:
Notice the dog is blowing a raspberry? Other fun pictures include an entire pirate family and an office guy named "Maaaaaaaark", of course.
DH's birthday is this weekend: Dinner out and the Bills game on Sunday. Perfect.
Enjoy the weekend!