International Mother Language Day on 21 February. Literature While proto-Bengali emerged during the pre-Islamic period, the Bengali literary tradition crystallised during the Islamic period. As Persian and Arabic were prestige languages, they significantly influenced vernacular Bengali literature. The first efforts to popularise Bengali among Muslim writers was by the Sufi poet Nur Qutb Alam. The poet established the Rikhta tradition which saw poems written in half Persian and half colloquial Bengali. The invocation tradition saw Bengali Muslim poets re-adapting Indian epics by replacing invocations of Hindu gods and goddesses with figures of Islam. The romantic tradition was pioneered by Shah Muhammad Sagir, whose work on Yusuf and Zulaikha was widely popular among the people of Bengal. Other notable romantic works included Layla Madjunn by Bahram Khan and Hanifa Kayrapari by Sabirid Khan. The Dobhashi tradition features the use of Arabic and Persian vocabulary in Bengali texts to illustrate Muslim contexts. Medieval Bengali Muslim writers produced epic poetry and elegies, such as Rasul Vijay of Shah Barid, Nabibangsha of Syed Sultan, Janganama of Abdul Hakim and Maktul Hussain of Mohammad Khan. Cosmology was a popular subject among Sufi writers. In the 17th century, Bengali Muslim writers such as such as Alaol found refuge in Arakan where he produced his epic, Padmavati. Bengal was also a major center of Persian literature. Several newspapers and thousands of books, documents and manuscripts were published in Persian for 600 years. The Persian poet Hafez dedicated an ode to the literature of Bengal while corresponding with Sultan Ghiyasuddin Azam Shah. The first Bengali Muslim novelist was Mir Mosharraf Hossain in the 19th century. The highly acclaimed poetry of Kazi Nazrul Islam espoused spiritual rebellion against fascism and oppression. Nazrul also wrote Bengali ghazals. Begum Rokeya was a pioneering Bengali female writer who published Sultana's Dream, one of the earliest examples of feminist science fiction. The Muslim Literary Society of Bengal was founded by free-thinking and progressive teachers of Dacca University under the chairmanship of Dr.Muhammad Shahidullah on 19 January 1926. The Freedom of Intellect Movement was championed by the society. When Bengal was partitioned in 1947, a distinct literary culture evolved in East Pakistan and modern Bangladesh. Shamsur Rahman was regarded as the country's poet laureate. Jasimuddin became noted for poems and songs reflecting life in rural Bengal. Al Mahmud was considered one of the greatest Bengali poets to have emerged in the 20th century. Humayun