'Pohela Boishakh' is the Bengali New Year. 'Boishakh' is the first month of the Bengali calendar, and 'Poila' stands for First. So, Poila Boishakh literally means the first day of the month of Boishakh, thus, marking the beginning of a new year. People greet each other saying, 'Shubho Noboborsho' where Naba means New and Barsho mean Year, together means New Year.
ANI