Nazrul Sangeet (), also Nazrul Geeti (; ), refers to the songs written and composed by Kazi Nazrul Islam, the national poet of Bangladesh. Nazrul Geeti incorporate revolutionary notions as well as more spiritual, philosophical and romantic themes. Nazrul wrote and composed nearly 4,000 songs (including gramophone records), which are widely popular in Bangladesh and India. Some of the most notable Nazrul Sangeet include Notuner Gaan, the national marching song of Bangladesh and O Mon Romzaner Oi Rozar Sheshe, an Islamic song on the festival of Eid-ul-Fitr and Jago Jogmaya Jago Mrinmoyee, a Durga Vandana on the festival of Durga Puja. Background Nazrul showed the symptoms of keen poetic and musical talent at his tender age and started writing songs when he was a member of a Leto group (Folk Musical Group). Following Kazi Bazle Karim, his uncle and a leader of a Leto group, he became an expert in composing songs and setting them to tunes. Joining the Leto group enhanced his musical career and put a significant impact on shaping his future musical life. At a very young age he was excelled in composing songs in different languages, apart from the Bengali language. He met Satish Kanjilal, a teacher of Searsol School who had an interest in classical music and some mastery over it. Observing Nazrul's irresistible inclination to music, Mr. Kanjilal imparted him some lessons on classical music. Later Nazrul widened hisknowledge on music when he was serving as a Havilder in Karachi Barrack under Bengal Regiment. He learned a great deal of Persian language, literature, and music with the help of a religious teacher from Punjab attached with the regiment. Nazrul Islam's musical style Revolutionary mass music The mass music and poems of Kazi Nazrul Islam have been widely used during the Indian Independence Movement and Bangladesh Liberation War. The music is highly motivational and revolutionary in nature with strong and powerful words and captivating tunes. It talks about the extremities of everything. The lyrics of those songs are provoking, as they talk against conservatism and about life on a broader parameter of philosophy and spirituality. The beauty of Nazrul's mass music lies in the freedom of its expression, which also drew immense criticism. However, those who understood its philosophy praised the courage and straightforwardness. Ghazal Nazrul's acquaintance with the tradition of Persian Ghazals, a form of love songs, was very significant in the sense that