Chhath Puja is celebrated on the sixth day of the month of Karthika in the Vikram Samvat, which also means it is the sixth days after Diwali.

This festival is dedicated to the sun god and his wife and is one of the most popular festivals in eastern Uttar Pradesh and Bihar. It is also an important festival in Nepal.

The festival lasts four days, with the third day generally being a public holiday in certain regions of India.