The Time Indiana Tried To Legally Change 'Pi' to 3.2
You can't change proven theories... unless you're Indiana's House of Representatives. They tried at least.
Pi
Illinois Restaurant Called One of America’s Best Places for Pie
I'm not usually a big fan of food-related National Days. You know, National Hot Dog Day? Things like that.
Happy 3.14 Day
Happy Pi Day March 14th, 3.14.