March 14 Fun Holiday – Pi Day. ... Pi Day celebrates the mathematical constant π (3.14). It is celebrated in countries that follow the month/day (m/dd) date format, because the digits in the date, March 14 or 3/14, are the first three digits of π (3.14). Pi Day was founded by Physicist Larry Shaw in 1988.
Apparently you can get a $3.14 pizza at 7-Eleven. I don't think 7-Eleven Canada is doing this, but if they are, message me! Maybe they will offer a special on 7/11 (July 11) in Canada.