Bhai Dooj in entire Northern part of India, it’s observed on the last day of the 5th day of Diwali festival. This is also the 2nd day of the Vikrami Samvat New Year, the calendar followed in Northern India (including Kashmir), which starts from the lunar calendar month of Kārtika. The first day of this New Year is observed as Govardhan Pūja.source: https://en.wikipedia.org/wiki/Bhau-beej
Date & Time of Bhai Dooj 2017 :
When is Bhai Dooj in 2017?
October 21 2017, Saturday
Dwitiya Tithi Begins = 01:37 on 21/Oct/2017
Dwitiya Tithi Ends = 03:00 on 22/Oct/2017