It is also known as the Karwa Chauth festival.
It is celebrated by especially married Hindu women and it is also celebrated by unmarried women as well.

This festival is celebrated by rituals and prayers for good health and long life of their husbands.
For the unmarried women, they pray for good husbands.
On this day, it is said that the colours of blue, black, brown and grey are avoided.

Three gods are specially worshipped on this very day. The names of the gods are Maa Parvati, Lord Ganesh and Lord Shiva.
Fasting is also a very significant role played by the women on this day.
On this day, the bond between the mother in law and the daughter in law is strengthened.