Bihu dance of Assam is the most widespread folk dance in the state and is enjoyed by all, young and old, rich and poor. The dance is part of the Bihu festival, that comes in mid April, when harvesting is done, and continues for about a month. Tribals of Assam have their own colourful festivals like Kherai Puja of the Bodos, the Baikhu and Pharkantis of the Rabhas, Ali-Ai-Lvigang and Parag by the Mishing, the Sagra-Miswa Wansawa and Loughun Puja by the Tiwas. The Ahoms of Tai origin celebrates Me-Dam-Mehfi. Bathow festival is celebrated by the Kacharis. The Dimasa celebrate Rangni Gobra and Narni Gobra. The Deoris observe Bohaggya Bishu.