WHAT ALL HAPPENED APRIL TO JUNE 1963
Find out what all happened April to June 1963

The Soviet nuclear-powered submarine K-33 collides with the Finnish merchant vessel M/S Finnclipper in the Danish straits. (12. April 1963)

In Addis Ababa, Ethiopia, the Organisation of African Unity is established. (25. May 1963)

Cardinal Giovanni Battista Montini is elected as Pope Paul VI. (21. June 1963)

Equal Pay Act of 1963 aimed at abolishing wage disparity based on sex (see Gender pay gap). It was signed into law on June 10, 1963 by John F. Kennedy as part of his New Frontier Program (10. June 1963)

Kenya gains internal self-rule (Madaraka Day). (1. June 1963)

129 American sailors die when the submarine USS Thresher sinks at sea. (10. April 1963)

Baldwin–Kennedy meeting on race relations in the US (24. May 1963)

The so-called "red telephone" is established between the Soviet Union and the United States following the Cuban Missile Crisis. (20. June 1963)

Movement of 15 Khordad: Protests against the arrest of Ayatollah Ruhollah Khomeini by the Shah of Iran, Mohammad Reza Pahlavi. In several cities, masses of angry demonstrators are confronted by tanks and paratroopers. (5. June 1963)

Racist bombings in Birmingham, Alabama disrupt nonviolence in the Birmingham campaign and precipitate a crisis involving federal troops. (11. May 1963)

Ciaculli massacre: a car bomb, intended for Mafia boss Salvatore Greco, kills seven police officers and military personnel near Palermo. (30. June 1963)

Berthold Seliger launches a rocket with three stages and a maximum flight altitude of more than 100 kilometres near Cuxhaven. It is the only sounding rocket developed in Germany. (2. May 1963)

Soviet Space Program: Vostok 6 Mission – Cosmonaut Valentina Tereshkova becomes the first woman in space. (16. June 1963)

The Bristol Bus Boycott is held in Bristol to protest the Bristol Omnibus Company's refusal to employ Black or Asian bus crews, drawing national attention to racial discrimination in the United Kingdom. (30. April 1963)

The U.S. Supreme Court case Brady v. Maryland is decided. (13. May 1963)

In Libya, amendments to the constitution transform Libya (United Kingdom of Libya) into one national unity (Kingdom of Libya) and allows for female participation in elections. (26. April 1963)

Pope John XXIII issues Pacem in Terris, the first encyclical addressed to all instead of to Catholics alone. (11. April 1963)

U.S. President John F. Kennedy gave his "Ich bin ein Berliner" speech, underlining the support of the United States for democratic West Germany shortly after Soviet-supported East Germany erected the Berlin Wall. (26. June 1963)

Project Mercury: The launch of the final Mercury mission, Mercury-Atlas 9 with astronaut L. Gordon Cooper on board. He becomes the first American to spend more than a day in space. (15. May 1963)

An assassination attempt of Greek left-wing politician Grigoris Lambrakis, who will die five days later. (22. May 1963)