Jonbeel Mela is a three-day annual native Tiwa Community fair held in the weekend of Magh Bihu at a historic place known as Dayang Belguri at Joonbeel, in Assam. Jonbeel Mela is 3 km from Jagiroad in Morigaon district of Assam and 32 km from Guwahati. It includes a paper mill and World's biggest dry fish market. This community fair was previously known as Nakhola. The National Highway which connects the Jonbeel Mela is NH 37. Joon is the Assamese word for Moon and Beel is wetland. The Joonbeel is so named because of its large natural water body shaped like a crescent moon. The Jonbeel Mela in Assam is said to have started not later than 15th century AD. The Jonbeel Mela was first organized by the Tiwa (Lalung) to discuss the then political situations.
Magh Bihu is a harvest festival celebrated in Assam, North-East India, which marks the end of harvesting season in the month of Maagha (January–February).