Vyasa Jayanti or Veda Vyasa Jayanthi is the birth anniversary of Sage Vyasa. He is known as the author of Mahabharata, and all Chaturvedas (four Vedas). Veda Vyasa Jayanti is celebrated on Vaishkha Shukla Chaturdashi, 14th day in Vaishakh month. In 2012, Veda Vyasa Jayanthi date is May 5. This festival is mainly observed in some communities of South India.
Vyasa Jayanti coincides with Narasimha Jayanti or Narsimha Chaturdashi. Another major festival dedicated to Vyasa Bhagawan is Vyasa Purnima or Guru Purnima.