Pi Day Celebrates 25th Anniversary!

Today is the 25th birthday of Pi Day! Yes, believe it or not, we actually set aside a day to celebrate the numerical constant that represents the ratio of a circle's circumference to its diameter, on a flat plane surface. Why was March 14th selected? Because while Pi has been calculated to one trillion digits past the decimal point, we all simply recognize it as 3.14, which also happens to be, today's date.