From Wiktionary, the free dictionary
From Assamese বিহু (bihu).
Bihu
- A set of three different cultural festivals of Assam and Assamese diaspora.
2011, Arupa Patangia Kalita, translated by Deepika Phukan, The Story of Felanee:In a little while it would be ‘Bihu’ – the Assamese New Year.