Bohag Bihu or Rangali Bihu also called Haat Bihu (Assamese: ব’হাগ বিহু, Hindi: बोहाग बिहू) (seven Bihus) is a festival celebrated in the state of Assam and north eastern India, and marks the beginning of the Assamese New Year. It usually falls on April 13, historically signifying the time of harvest. It falls on April 14 in 2017
Source:Wikipedia