Jamai Sasthi Festival is dedicated to Jamai who is called son-in-law. The festival is celebrated to bring son-in-law nearer to the family of his in laws.

On this day, goddess Sasthi is worshiped. It is said that there were three sons and three daughters in laws in a family. Amongst the three daughters in law, the youngest one was very greedy and ate all the food of the house but blamed all this on a black cat. The black cat stole all her new born seven children turn by turn and gave them to Goddess Sasthi.

After losing her children she became sad and repented for her deeds. Therefore Goddess Sasthi appeared and asked her to seek mercy from the cat. She admired that cat and worshiped Goddess Sasthi by performing all rituals. In the end she got all her children back. Since then this festival is celebrated for the children well being.

Jamai Sasthi is celebrated in the month of Jaishto that is May or June in Kolkata, West Bengal in India.

It is believed that by worshipping Goddess Sasthi on this day he will protect children, couples and the entire family. On the occasion the son-in-laws are invited by their in laws. A number of rituals are performed by the mother-in-law for the well being of their son-in-law and daughter.

The mother in law touches the forehead of her son-in-law to bless him a long life. After that she ties a thread on his hand. When she has done all rituals she serves them all with delicious Bengali food.