Diwali, also known as Deepavali, is the Hindu festival of lights celebrated in autumn. As the Hindu calendar is lunar-based, Diwali falls on different dates each year in October or November. Diwali commemorates the return of King Rama to his kingdom after defeating the demon Ravana and symbolizes the victory of light over darkness. Homes and public places are decorated with lights and fireworks, and sweets are exchanged between family and friends to celebrate.