It usually falls between October and November in the Gregorian calendar. The Sun considered as the god of energy and of the life-force, is worshiped during the Chhath festival to promote well-being, prosperity and progress.
The ritual of Chhath Parba includes taking holy bath, fasting, standing and worshiping the sun for a long time and offering Prasad and Argha to the ‘Rising and setting Sun”.
Chhath is a festival of bathing and worshipping that follows a period of abstinence and segregation of the worshiper from the main household for four days.
During this period, the worshiper observes purity and sleeps on the floor on a single blanket.
This is the only holy festival which has no involvement of any pandit (priest).
The devotees offer their prayers to the setting sun and then the rising sun in celebrating its glory as the cycle of birth starts with death.
It is seen as the most glorious form of Sun worship.