When did eople started celebrating nabanna?

Nabanna, the Bengali harvest festival, is traditionally celebrated after the rice harvest, which typically occurs in late November to early December. The festival has its roots in agrarian practices and cultural traditions of Bengal, with celebrations likely dating back centuries. It signifies the joy of the harvest and the abundance of food, reflecting the agrarian lifestyle of the Bengali people. Over time, Nabanna has evolved into a vibrant cultural event featuring music, dance, and culinary delights.