Holi is a significant Hindu festival marking the end of winter and the arrival of spring, celebrated on the last full moon of the lunar month Phalgun. The festival symbolizes the victory of good over evil, particularly the story of Prahalad and Holika, and includes customs like bonfire lighting and playful color smearing, originating from the playful celebrations of Lord Krishna. Though traditionally celebrated with natural colors, modern practices have introduced chemical dyes, which has raised concerns about safety and health.