The birth of Lord Krishna an incarnation of Lord Vishnu is celebrated on the eight day (Ashtami) of a lunar fortnight in August-September hence the name (Krishna + ashtami). Krishnastami is celebrated over two days. This first day is Krishnastami or Gokulastami. The second day is called Kalastami or more popularly Janmastami.
Men and women fast and pray on the occasion of Janmashtami. As it is the worship of infant Krishna, who was fond of milk and butter, women prepare a variety of delicacies with milk products as offerings. This festival is a community celebration and people visit temples which are specially decorated for this occasion.