The year 1975 was the 4th year after the independence of Bangladesh. It was also the last year of the first post-independence government in Bangladesh and a year marked with a coups and coup d'état.
16 October - Rahima Banu's smallpox infection is reported. She is the last known person to have been infected with naturally occurring Variola major.[4]
3 November: Jail Killing Day, assassination of four leaders of liberation war in prison.
7 November: After a successful coup d'état Major Gen. Ziaur Rahman proclaims himself deputy martial law administrator with Chief Justice Sayem as Chief Martial Law Administrator.
^Heitzman, James; Worden, Robert, eds. (1989). "Table A. Chronology of Important Events". Bangladesh: A Country Study. Washington, D.C.: Federal Research Division, Library of Congress. p. xvii.