Chhath or Suryasashti is a unique festival with rituals to pray to Sun God and his consorts Usha and Pratyusha. It is probably the only festival of its kind where prayers are offered to both the setting sun and the rising sun. The devotees worship sun for its bounties that let life survive on the planet. Prayers are offered to sun for good health and prosperity.
The festival is performed with great enthusiasm in Eastern India — Uttar Pradesh, Bihar, West Bengal, Jharkhand, Odisha.
The rituals are very eco-friendly and almost all aspects of the rituals have natural benefits to derive from. Almost all fruits offered in the prayers are seasonal and rich in vitamin C, probably to provide us strong immunity during the winter months.