The National Mathematics Day (NMD) is observed on December 22 each year. It is celebrated to commemorate the birth anniversary of the great Indian mathematician Srinivasa Ramanujan. 

• Ramanujan, one of the greatest Indian mathematicians of all time, is known for his work in the areas of Riemann series, hypergeometric series, elliptic integrals, continued fractions, and functional equations of the zeta function.
• Srinivasa Ramanujan was born on  December 22, 1887 in Erode, Tamil Nadu. At a young age of 12, he had gained knowledge in Trignometry and at the age of 15, he obtained a copy of George Shoobridge Carr's Synopsis of Elementary Results in Pure and Applied Mathematics.

History:

December 22 was designated as the National Mathematics Day by the Manmohan Singh government in 2012. Since then, the National Mathematics Day has been celebrated every year.