Well the large part of India celebrates Lakshmi Puja during Diwali, especially in the North of the country, but Bengalis as usual being different celebrates 'Lakhi Pujo or as precisely known as Kojagori Lakhi Pujo, on the full moon as a culmination of Durga Pujo.

Like the usual celebration this day in Bengali household is a day of festivity, celebration and feasting. This day was attributed to a certain section of Bengalis- especially to the one's who migrated from East Bengal, which became Bangladesh in 1971.

Yes in Bengalis too there are regional divisions, which practically divides the Bangaal from Ghoti. The Bangaal also known as the Purba-bongiyo (East Bengal) and the Ghoti from Paschim-Bangiyo (West Bengal).

According to the harvest cycles Lakshmi Pujo is celebrated, today is Purnima or full moon thus Bengalis across are celebrating. During the partition of India, more than 15 million people came from East Pakistan ( now Bangladesh), and a majority of them were Bangaal, as they came to be known as migrated to West Bengal which was not adequately equipped to handle the large influx of immigrants.

The locals or Ghotis started viewing Bangaals as intruders, lacking refinement and culture. Since the immigrants were forced to leave behind most of their property and jobs in East Bengal, poverty was a natural outcome for the refugees. Moreover, the large influx created competition in the job market and housing for the local population who began considering them as a nuisance. These socio-economic issues led to cultural marginalisation or the great divide between the Ghoti and Bangaal.

The Bangaals used to await for this event after Durga Puja, and celebrated it with a lot of grandeur, thus slowly and gradually Kojagari Lakshmi Pujo gained momentum in the new found homeland, and became a festival for all Bengalis.