About Sadiq al-Mahdi
Sadiq al-Mahdi (Arabic: الصادق المهدي, romanized: aṣ-Ṣādiq al-Mahdī; 25 December 1935 – 26 November 2020), also known as Sadiq as-Siddiq, was a Sudanese political and religious figure who was Prime Minister of Sudan from 1966 to 1967 and again from 1986 to 1989. He was head of the National Umma Party and Imam of the Ansar, a Sufi order that pledges allegiance to Muhammad Ahmad (1844–1885), who claimed to be the Mahdi, the messianic saviour of Islam. Sadiq al-Mahdi was Prime Minister of Sudan on two occasions: first briefly between 1966 and 1967 and second from 1986 until his ousting on 30 June 1989.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.