Gangasagar Mela is the largest fair celebrated in West Bengal. This fair is held where the Ganga and the Bay of Bengal form a nexus. Hence the name Gangasagar Mela.
The river Ganga which originates in the Gangotri glacier in the snow clad Himalayas, descends down the mountains, reaches the plains at Haridwar, flows through ancient pilgrimage sites such as Benares and Prayag, and drains into the Bay of Bengal. Sagar Island, at the mouth of the river Hooghly in Bengal (accessed from Diamond Harbor), where the Ganga breaks up into hundreds of streams, and drains into the sea, is honored as a pilgrimage site.
A dip in the ocean, where the Ganga drains into the sea is considered to be of great religious significance particularly on the Makara Sankranti day when the sun makes a transition to Capricorn from Sagittarius and this town becomes home to vast fairs, drawing visitors and recluses from all over the state. There is a common belief among the locals that the girls who take the holy dip get handsome grooms and the boys get beautiful brides. When they are done with the ritual obligations, they head towards the Kapilmuni Temple situated nearby, to worship the deity as a mark of respect.