September 2 – Indian Hungry generation poets, including Malay Roy Choudhury, are arrested on charges of conspiracy against the state and obscenity in literature.

September 4 – The Forth Road Bridge opens over the Firth of Forth in Scotland.

September 10 – The African Development Bank (AfDB) is founded.

September 11 – In Jacksonville, Florida, during a tour of the United States, John Lennon announces that the Beatles will not play to a segregated audience.

September 14 - The third period of the Second Vatican Council opens. The London Daily Herald ceases publication, replaced by The Sun.

September 18 – In Athens, King Constantine II of Greece marries Princess Anne-Marie of Denmark, who becomes Europe's youngest Queen at age 18 years, 19 days.

September 21 – The island of Malta obtains independence from the United Kingdom.

September 24 – The Warren Commission, the first official investigation of the assassination of United States President John F. Kennedy, submits its written report.

September 25 – The Mozambican War of Independence is launched by FRELIMO. (source: Wikipedia)