On the 4th day of the bright half of Bhadrapad, the great festival of Ganesh or Ganpati is celebrated as Ganesha Chaturthi. This festival marks the birthday of Lord Ganesh. Lord Ganesha or Ganpati is one of the most popular deities in Hindu religion. Both Shaivites and Vaishnavites worship him. Even Buddhists and Jains have respect for Ganpati. He is considered to be an avatar of both Shiva and Vishnu.