[2] Kabir was born on 28 February 1925 in Noakhali District, Bengal Presidency, British India.
[3] He completed his Ph.D. at the SOAS University of London in 1953 with his thesis on Buyid dynasty.
[3] In the early 1960s, he was part of a study trip of history masters students from the University of Dhaka to India.
[3][8] He served as the treasurer, vice-president, and general secretary of the Asiatic Society of Bangladesh for various terms.
[3] Kabir worked as the honorary curator of Dhaka City Museum.