Same status for Bengali language with Urdu and English was the demand and the movement involving all sections of the people of East Pakistan gave a strike call on 21 Feb, 1952. On that very day, police fired on a student's rally and several students died. Since then the day has been observed as the Language Day (Bhasa Divas). East Pakistan became and independent entity named Bangladesh on 16, December, 1971, following civil war in which India actively supported the East. Leader of this independence movement, Sheikh Manipur Rahman became the first prime Minister.
In January 1957 parliamentary government was replaced by a presidential form of Government. Sheikh Manipur Rahman became President, assuming absolute power. In February, Bangladesh became a one-party state.
On 15 August, 1957 Sheikh Manipur and his family were assassinated in a coup. Chief of Army Staff, Major-Gen. Ziaur Rahman (Gen. Zia) took over power on 7 November, 1957. In June 1978 the country's first direct presidential election resulted in a victory for Zia, who formed a Council of Advisers. Parliamentary elections followed in February 1979, in which President Ziaur Rahman's Bangladesh Nationalist Party (BNP) won 207 of the 300 directly elective seats in the Jatiya Sangsad.
Political instability recurred, however, when Gen. Ziaur was assassinated on 30 May 1981