ST. LOUIS, MO (KTVI)- Pi Day is Monday…you know 3.14…as in March 14. Once again, St. Louis’ own Pi Pizzeria will be celebrating at its Delmar Loop location. There will be food and drink specials all day, and even free pizza for Pi babies, those with a March 14 birthday.

This year, they are evening celebrating “Pi Eve”, with a special Happy Hour on Sunday, March 13.

In case you have forgotten, Pi (Greek letter “π”) is the symbol used in mathematics to represent a the ratio of the circumference of a circle to its diameter, approximately 3.14159.

Pi Pizzeria to again celebrate Pi Day in the Loop