What Date Is 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. Pi is an important symbol in mathematics, statistics and physics.
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. January 1, 2025 application deadline: