While the U.S. may have 11 official federal holidays, there are actually thousands of quirky, themed days that make the ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its ...

Not matter how you slice it, March 14 has something for everyone. The national holiday has been celebrated for decades now, since the late 1980s, thanks to a San Francisco physicist. Larry Shaw, also ...