Chhath Puja 2026 Day 4 is on November 16. Check Usha Arghya sunrise timings, Parana time, Saptami Tithi, puja vidhi, rituals and significance. Chhath Puja 2026 Day 4: When Is Usha Arghya and Parana?Chhath Puja's fourth and final day, Usha Arghya, will be observed on Monday, November 16, 2026. On this day, devotees gather at riverbanks, ponds and other water bodies before sunrise to offer Arghya to Surya Dev.