ST. LOUIS – Today marks National Pi Day, a celebration of the mathematical constant, and businesses in St. Louis are joining in on the fun with the festivities and special deals. Pi Day is celebrated ...
*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Forget the mathematics; it’s all about the area code here. In the rest of the country, March 14 is informally known as Pi Day ...