♦ International Day of Mathematics is annually celebrated on March 14. The day is also called as Pi Day.

♦ The day was first celebrated in 1988 after Physicist Larry Shaw. The day is written in the MM/DD format so that it represents the value of Pi that is 3.14. 

♦ The day was recognised by the United Nations Educational, Scientific and Cultural Organization (UNESCO) during its general conference in 2019. 

♦ The value of Pi was first calculated by a mathematician who was called Archimedes of Syracuse. However, the value was officially accepted by the scientific community only after Leonhard Euler came up with the symbol of Pi in 1737.

♦ 2026 theme: Mathematics and hope