Births on April 23

Barry Douglas, Irish pianist and conductor

William Barry Douglas (born 23 April 1960) in Belfast, Northern Ireland, is a classical pianist and conductor.

17 Mar

Bay of Pigs Invasion
U.S. President Dwight D. Eisenhower signs the National Security Council directive on the anti-Cuban covert action program that will ultimately lead to the Bay of Pigs Invasion.
21 Apr

Rio de Janeiro
Brasília, Brazil's capital, is officially inaugurated. At 09:30, the Three Powers of the Republic are simultaneously transferred from the old capital, Rio de Janeiro.
9 May

Combined oral contraceptive pill
The Food and Drug Administration announces it will approve birth control as an additional indication for Searle's Enovid, making Enovid the world's first approved oral contraceptive pill.
4 Jul

Flag of the United States
Due to the post-Independence Day admission of Hawaii as the 50th U.S. state on August 21, 1959, the 50-star flag of the United States debuts in Philadelphia, almost ten and a half months later (see Flag Act).
29 Oct

Muhammad Ali
In Louisville, Kentucky, Cassius Clay (who later takes the name Muhammad Ali) wins his first professional fight.