World Pi Day 2024. Pi (greek letter “ π ”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.  — college students, rocket scientists and math enthusiasts around the world are celebrating pi day.

Unesco’s 40th general conference proclaimed 14 march of every year international day of mathematics in november 2019 (40c/ resolution 30). The holiday commemorates a timeless symbol beloved by many in mathematical and.