Chhath Puja is a significant Hindu festival dedicated to the Sun God, Lord Surya, observed primarily in the states of Bihar, Jharkhand, Eastern Uttar Pradesh, and Nepal. This four-day festival, known as Kartiki Chhath, occurs in the Indian month of Kartika, typically in October and November. The celebration involves a 36-hour fast during which participants abstain from food and water, culminating in the offering of 'Bihaniya Arghya' to the rising sun. The festival is rooted in ancient traditions, with references found in the Vedas and the Mahabharata, where it is noted that Draupadi performed these rituals to aid the Pandavas. Chhath Puja is marked by various rituals that reflect the cultural and religious significance of sun worship in Hinduism.