India is celebrating National Mathematics Day on December 22 every year (since 2012) to commemorate the birth anniversary of great Indian Mathematician Srinivasa Ramanujan.
About Srinivasa Ramanujan
Ramanujan was born on 22 December 1887 in Erode district of Tamil Nadu. Ramanujan did wonders in number theory, infinite series, mathematical analysis, and making formulas and equations. He compiled more than 3900 mathematical results and equations, and his discoveries namely Ramanujam Prime and Ramanujam theta inspired further research on the subject. Ramanujan was said to be a natural genius, in the same league as mathematicians such as Euler and Gauss. He died on 26 April 1920.