What Is Pi Day 2024 Date Holiday Deals Canada. Pi (greek letter “ π ”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its. Pi day is celebrated on march 14th (3/14) around the world.

Math enthusiasts around the world, from college kids to rocket scientists, celebrate pi day on thursday. History, top tweets in canada, 2025 date, facts, and things to do.