The most famous festival celebrated in India is Diwali, also known as the Festival of Lights. It symbolizes the victory of light over darkness and good over evil. Diwali is celebrated by millions across the country and involves various traditions such as lighting oil lamps, bursting fireworks, and exchanging sweets. Families gather to worship deities like Goddess Lakshmi for wealth and prosperity. The festival usually falls in October or November, depending on the lunar calendar, and each region observes unique customs that add to the vibrancy and spirit of the celebration.