When Is Pi Day 2024 In Us. Pi day is an annual celebration of mathematics on march 14th (3/14), the date that represents the first three digits of pi. Math enthusiasts and bakers celebrate pi day on.
Pi day is observed on march 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant figures of ฯ. โ pi day is celebrated on march 14 because the first three numbers of pi are 3, 1 and 4.