Assam being a land of composite culture reflects a chain of festivals of different tribes throughout the year.

1. Assamese Bihu festival is the most important and pretty common and celebrated all over Assam in a grandest way. It is the Assamese New Year which is celebrated in April of the Gregorian calendar. 

2. Christmas is observed with great merriment by Christians of various cultures, including Catholics and Protestants, throughout Assam.

3. Durga Puja, a festival introduced and popularized by Bengalis in Assam, is widely celebrated across the Assam.

4. Muslims celebrate two Eid festivals (Eid ul-Fitr and Eid al-Adha) with much eagerness all over Assam.

5. Assamese Sattriya Dance Bihu festival is a series of three prominent festivals in Assam. Primarily a non-religious festival celebrated to mark the seasons and the points of a cultivator’s life over a yearly cycle in Assam.

6. Three Assamese Bihus festivals- Rongali or Bohag, is celebrated in Assam with the coming of spring and the beginning of the sowing season; Kongali or Kati, the barren Bihu when the fields are lush but the barns for all intents and purposes are empty. The Bhogali or Magh, the thanksgiving when the crops have been harvested and the barns. Bihu songs and Bihu dance are associated to rongali bihu in Assam. The day before the each bihu is known as 'uruka'. The first day of 'rongali bihu'  is called 'Goru bihu' (the bihu of the cows), when the cows  are taken to nearby rivers or ponds in Assam to be bathed.

7. Bwisagu mostly is one of the popular seasonal festivals of the Bodos in Assam. Bwisagu  start of the New Year or age in a fairly major way. Baisagu is a Boro word which essentially originated from the word "Baisa" which means year or age, "Agu" that means starting or start. 

In the past, the celebration and festivals in Assam were primarily important in the religion-cultural sense. Today, the celebrations in Assam culture witnesses the shifting of stages and is revamped to suit new contexts and interpretations.

The traditional culture dances in Assam, which form the core of the every Assamese festival is now performed in out-of-village settings in Assam and are staged in a secular very Assamese public sphere. 

Moreover, there are for all intents and purposes other important traditional festivals being for all intents and purposes celebrated every year on different occasions at different places in a

Many of these festivals in Assam are celebrated by different Assamese ethno-cultural groups (sub and sister cultures).