Diwali is a significant Hindu festival that celebrates the triumph of light over darkness, good over evil, and wisdom over ignorance. It is a time to express gratitude for the harvest and seek blessings for a prosperous year ahead. Diwali is celebrated by lighting oil lamps called diyas and spans five days, each day dedicated to a different deity or aspect of the festival. It brings Hindus together to celebrate their beliefs and culture, and to reflect on the concepts of light, darkness, and knowledge.