Diwali is a major Hindu festival celebrated in autumn that signifies the victory of light over darkness. It is celebrated for five days, with each day having significance. Diwali is a time for families to get together, light oil lamps, decorate their homes with rangoli patterns, exchange gifts, and worship the goddess Lakshmi who symbolizes wealth and prosperity. The festival originated from the story of Lord Rama returning to his kingdom of Ayodhya after defeating the demon king Ravana.