The annual Bengali New Year parade.

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Pohela Boishakh, the Bengali new year, is the major festival of Bengali culture and sees widespread festivities. Unlike holidays like Eid al-Fitr, where dressing up in lavish clothes has become a norm, or Christmas where exchanging gifts has become an integral part of the holiday, Pohela Boishakh is really about celebrating the simpler, rural roots of the Bengal. As a result, more people can participate in the festivities together without the burden of having to reveal one's class, religion, or financial capacity. Other cultural festivals include Nabonno, and Poush Parbon both of which are Bengali harvest festivals.

Source: wikipedia.org