Question

what is the famous festival of bihar.

Answer 1

chatt puja is famous festival

Answer 2

Chhath or "Dala Chhath," is the most important festival in Bihar. Celebrated twice a year, once in the summers called as Chaiti Chhath, and again around a week after Deepawali called the Karthik Chhath.

Apart from Chhath puja, people of bihar also celebrates festivals like Durga Puja, Bhaiya Dooj, Holi, Saraswati Puja etc.