Watch | Chhath Festival Celebrations from various parts of Assam with The Sentinel News. This year Chhath Festival will be celebrated this time on 2nd and 3rd November. Chhath Puja is said to be completed after offering Arghya to the Sun. The first Sun of Chhath Vrat is given on Arghya Shashthi Tithi. According to religious beliefs, this arghya is offered to Pratyusha, wife of Lord Surya.