Bohag Bihu or Rongali Bihu also called Xaat Bihu (seven Bihus) is a traditional ethnic festival celebrated in the Northeastern Indian state of Assam and other parts of Northeastern India by the indigenous ethnic groups of Assam, and marks the beginning of the Assamese New Year.

The festival is of mostly aboriginal origin comprising Tibeto-Burman and Tai elements.

[1] The holiday unites the different native communities of Assam regardless of their backgrounds and promotes the celebration of ethnic diversity.

[5][6][7][8] In Assam locally the onset of 'Bohag' (Assamese Calendar) marks the starting of Rongali Bihu.

Each festival historically recognizes a different agricultural cycle of the paddy crops.