There are many festivals that are celebrated by the Hindus of Bihar and Jharkhand. The Hindu festival of Chhatt is unique to that region. Chhatt is dedicated to the worship of the Sun God and therefore, is also known as Surya Shashti. Chhatt is celebrated as thanks to the Sun for providing the necessities of life on earth, and also for fulfilling particular wishes.
The word Chhatt denotes the number six and thus the festival begins on the sixth day of the Hindu month of Kartik in the Hindu lunar calendar, which falls in late October and November.