Diwali (Dīvali, Dīpāwali, or Deepavali) is a festival of lights observed in October or November each year.
Diwali is called the Festival of Lights and is celebrated to honor Rama-chandra, the seventh avatar (incarnation of the god Vishnu). It is believed that on this day Rama returned to his people after 14 years of exile during which he fought and won a battle against the demons and the demon king, Ravana. People lit their houses to celebrate his victory over evil (light over darkness).