The celebration in India marked by the lighting of oil lamps and candles is called Diwali, also known as the Festival of Lights. Held in October or November, this festival signifies the victory of light over darkness and good over evil. During Diwali, families decorate their homes with diyas (oil lamps), candles, and colorful rangoli. The festival includes the exchange of sweets, fireworks displays, and prayers to Lakshmi, the goddess of wealth and prosperity, promoting harmony and joy in communities.