Usha Arghya: Hindu devotees take a holy dip before offering 'Usha Arghya' to Sun on last day of Chhath Puja as perform rituals in Yamuna river during Chhath Puja festival in New Delhi, India, on Nov. 11, 2021. River Yamuna is covered by chemical foam caused due to industrial and domestic pollution. Chhath Puja, a four-day ancient Hindu festival dedicated to Lord Surya (Sun God) and his sister Chhathi Maiya, is celebrated on the sixth day of the month of Kartik. Photo by Shailendra Pandey/Indian Photo Agency (InPA)