Chhath is a primeval festival that is being celebrated in India since centuries. The festival and its celebration are entirely dedicated to Surya Dev (Lord Sun) and Chhati Mata (Goddess Usha, wife of Lord Sun).

Chhat is one of the most ancient Hindu festivals. The festival of Chhath is an annual Hindu Vedic Festival and it has great historical values.

Traditionally this festival occurs twice a year. However, in the contemporary monarchy of India, Chhath is celebrated on the sixth day of the month of Karthika of the Hindu calendar. Chhath Puja typically falls in the month of October or November each year. This festival is also known as Karthika Chhath and it falls accurately on the 6th days following Deepawali.

The festival falls in the summer season as well and itis called Chaiti Chhath. Alongside this, Chhath is also known as Chhathi, Chhath Parv, Chhath Puja, Dala Chhath, Dala Puja, and Surya Shashthi across the country.