Chhath Puja is an important festival in Bihar, Jharkhand, and some other regions of North India. Chhath Puja 2016 dates are – November 5, November 6 and November 7.
Chhath Puja is observed for four days in Kartik month – starts on Kartik Shukla Chaturthi and ends on Kartik Shukla Saptami.
Chhath Nahai Khai date is 5 November 2016 (Chhati Parv Shuru)
Chhath Kharna date is 6 November 2016 (Dala Chhati Puja, Surya Shashti)
Chhath Sanjha Argh is on November 6, 2016 (Sayam Surya Bhagawan Ko Arghya)
Suryoday Argh Puja date is November 7 , 2016 (Subah ka Arghya)
Not only in Bihar, it also observed in other cities like New Delhi, Kolkata, Mumbai, Bangalore, Chennai, Hyderabad, Guwahati, Kanpur, etc. where Bihari people live.