Here is your short paragraph on Assamese Festivals:
The State of Assam is located in the north-east corner of India and is bounded by Bhutan and Arunachal Pradesh on the north, Nagaland and Manipur on the east, Meghalaya and Mizoram on the south and Bangladesh, Tripura and West.
Bengal on the west. Only a narrow strip of sub-mountain region of the Himalaya connects Assam with the Indian main land.
Flat alluvial valley is drained by the mighty Brahmaputra. The great river originates in western Tibet which brings down 6,500 lakh cubic feet of very fertile silt annually which is deposited in the valley between the Himalaya massif and the Meghalaya plateau and thence in the vast tract of Bengal Delta.
Assam is the home of many colourful festivals. Bihu is the main festival celebrated on three occasions. Rangoli Bihu or Bohag Bihu marks the arrival of the cropping season and ushers in the New Year. Bhogali Bihu is the harvest festival, while Kangali or Kati Bihu of lean period. These Bihu celebrations are very popular agricultural festivals.
Besides, Vaishnavites observe birth and death anniversaries of eminent Vaishnava saints through day long chanting of hymns and staging of Bhaonas (a theatrical forms in traditional style).
Other well-known festivals are Durga Puja, Ambubachi in Sakia shrines and Sivaratri in Six temples. Among significant fairs, the mention could be made of Sivaratri mela at Umananda and others places in Siva temples, Asokastami mela, Push mela, Parasuram mela, Ambubachi mela.