Chhath is a major Hindu festival celebrated in Bihar and Uttar Pradesh,
along with other North Indian states. This festival is celebrated after
the completion of Diwali, which generally falls in the months of October
and November. Chhath Puja is dedicated to Sun God for supporting life
on earth and ensuring prosperity and happiness in life. The history of
the Chhath Puja dates back to ancient Vedic times as the hymns
associated with the worshipping of Sun God are present in Vedic text
Rigveda. Some people also believe that the rituals of Chhath Puja were
started by Draupadi of epic Mahabharata. There is another theory
regarding the origin of Chhath Puja, which also relates from
Mahabharata. It is believed that Karna, the great warrior and the son of
the Surya started the rituals of Chhath Puja.
According to Hindu calendar, Chhath Puja is celebrated on the sixth day
of Kartik month. Chhath Puja, also known as Surya Shashti, is a bathing
festival followed by a four day period of abstinence and ritual purity.
This festival is widely observed in Bihar where a large number of sun
temples are present. These sun temples are generally surrounded by a
surajkund, also known as sacred pool of sun, which constitute of the
place of worship for the devotees. Traditionally, Chhath Puja is
performed by women, however large number of men also register their
presence during this festival.

Chhath Puja is a four-day long strict and spiritual observance. The
first day of the Chhath Puja includes taking a dip in the holy river
Ganges. People also take the water of Ganges to their home to perform
special offerings and rituals. Houses are thoroughly cleaned on this
day. The second day of Chhath, also known as Kharna, involves devotees
to observe a day long fast which is broken in the late evening after
performing the worship of Mother Earth. The offerings to the God include
rice pudding (kheer) and fruits, which is distributed among family
members and friends. The third day of Chhath goes in the preparation of
the prasad (offerings) for the evening offerings, also known as Sanjhiya
Arghya.

In the evening, large numbers of devotees gathers on the banks of river
Ganga and make offerings (Arghya) to the setting sun. The folk songs are
played in the evening displaying the culture and history of Bihar.
Nowadays popular Bollywood songs are remixed and played during this
occasion. The night of the third day witnesses a colorful event known as
Kosi. A canopy is made from five sugarcane sticks and lighted earthen
lamps are place inside canopy along with baskets filled prasad. On the
fourth and final day of Chhath, family members and friends go to the
banks of river before sunrise and make offerings (Aragh) to the rising
sun. After this ritual, devotees break their fast and distribute prasad
to neighbors and relatives.