Did you celebrate?  I did, but admittedly I can only make that claim after the fact, as I only found out about this day long after I had already had wolfed down a Wendy's Hamburger and Chicken Sandwich.

Here is the info, the what and why about it (via Michelle Malkin):

http://www.yourish.com/2007/03/12/2850

Don't forget, this Thursday, March 15th, is the fifth annual International Eat a Tasty Animal for PETA (IEATAPETA) Day, the day on which we annoy vegans the world over, and PETA, which is right here in my state of Virginia.

From the original IEAFPD pos

PETA has started yet another offensive ad campaign. This one really reaches bottom-they are using Holocaust terminology, quotes, and pictures to liken the "slaughter" of animals to the slaughter of the Jews by the Nazis.

In other news of the day (which has some asking what a cow's doing in with the pigs), a party in the nasty divorce involving Sir Paul McCartney went sneaking into a commercial pig farm in the dead of night to "highlight animal cruelty".  While claiming to have done nothing illegal, the owner of the farm is nonetheless said to be pursuing legal action.