Chhath is also known as Surya Shashti- an ancient Hindu Festival dedicated to the Hindu Sun God, Surya.
The rituals of Chhath puja are most difficult to observe, particularly, the 40-hour fasting that the devotees observe.
In fact, the procedures of observing fast during Chhath puja are so tough that the vratis (those who observe fast) are revered by all.
