Complex sentence: In India, the National Mathematics Year is celebrated as a tribute to the mathematical genius Srinivasa Ramanujan who was born on 22 December 1887 and whose 125th birthday falls on 22 December 2012.
Split into simpler sentences: In India, the National Mathematics Year is celebrated as a tribute to the mathematical genius Srinivasa Ramanujan who was born on 22 December 1887. And whose 125th birthday falls on 22 December 2012.