Durga Puja is celebrated with joy all over India, especially West Bengal in worship of Goddess Durga. Singing, dancing, sweets & gaiety are an integral part of the Durga Pooja Festival. People send Durga Puja Gifts to dear ones and express good wishes.
This is also known as Dussehra and Navaratriin other parts of India. Durga is the Goddess of divine power against all evils.  The story goes that Mahisasur, the Buffalo Demon, through years of praying, received blessing from Lord Brahma, that no power can kill him which means he is invincible. But once gaining this power he started ravaging the whole world and killing people. And finally he wanted to uproot the Gods too. The Gods, in dismay, combined their powers to create a beautiful maiden, and each placed his or her most potent weapon in one of her ten hands riding a lion. Her return in each year in the Bengali month of Aswin (September-October) commemorates Rama's invocation of the goddess Durga before he went into battle with Ravana. The traditional image of the Bengali Durga follows the iconographic injunctions of the Shastras. It is similar to the Durga of Aihole and of Mahabalipuram (seventh century). The tableau of Durga with her four children - Kartik, Ganesh, Saraswati and Lakshmi, representing respectively the Protector, the Initiator of the puja, Knowledge and the Provider - signifies the complete manifestation of the goddess