Diwali, also known as Deepavali, is one of the most important and widely celebrated festivals in Hinduism, and it holds significance for Jains, Sikhs, and some Buddhists. Known as the Festival of Lights, it symbolizes the victory of light over darkness, good over evil, and knowledge over ignorance.

Tamil Thai Pongal Day is a Tamil Hindu harvest festival dedicated to the Sun God. Celebrated with the cooking of sweet rice (Pongal), Kolam designs, and rituals of thanksgiving, it marks prosperity and cultural unity. In Sri Lanka, it is a national holiday honoring Tamil traditions.

Maha Shivaratri Day, rooted in Vedic traditions and enriched through the Puranas, commemorates major legends of Lord Shiva, including his marriage to Parvati, the drinking of poison during the cosmic churning, and his Tandava dance.