Mathematical constant 'Pi' day celebrated on Tuesday
The International Pi Day is celebrated each year on March 14 as it coincides with the mathematical constant Pi's value (3.14159...). The symbol 'π' (Greek letter pi) was introduced by William Jones in 1706 to denote the ratio of a circle's circumference to its diameter. However, it was popularised by Swiss Mathematician Leonhard Euler, who adopted it in 1737.