Srinivasa Ramanujan It is one of the most romantic stories in the history of mathematics: in 1913, the English mathematician G. H. Hardy received a strange letter from an unknown clerk in Madras, India. The ten-page letter contained about 120 statements of theorems on infinite series, improper integrals, continued fractions, and number theory (Here is a .dvi file with a sample of these results). Every prominent mathematician gets letters from cranks, and at first glance Hardy no doubt put this letter in that class. But something about the formulas made him take a second look, and show it to his collaborator J. E. Littlewood. After a few hours, they concluded that the results 'must be true because, if they were not true, no one would have had the imagination to invent them'

On December 22, 2012, Google India celebrates the 125th Birthday of Srinivasa Ramanujan with a Doodle.
It also marks the National Mathematics Day..