* 1939 – 1945, the Second Battle of the Atlantic.

* 1945 – World War II: Sarajevo is liberated from German and Croatian forces by the Yugoslav Partisans.

* 1945 – World War II: the Battle of Slater's Knoll on Bougainville comes to an end.

* 1945 – Neal Boortz, American radio personality

* 1945 – U. S. President Franklin D. Roosevelt dies while in office ; vice-president Harry Truman is sworn in as the 33rd President.

* 1945 – Lee Jong-wook, Korean Director-General of the World Health Organization ( d. 2006 )

* 1945 – World War II: Führerbunker: Adolf Hitler and Eva Braun commit suicide after being married for one day.

* 1945 – Annie Dillard, American writer

* 1945 – Mimi Fariña, American singer-songwriter, musician, and activist ( d. 2001 )

* 1945 – Michael J. Smith, American astronaut ( d. 1986 )

* 1871 – Theodore Dreiser, American author ( d. 1945 )

* 1905 – Aris Velouchiotis, Greek military leader ( d. 1945 )

* 1945 – Jan Sloot, Dutch inventor ( d. 1999 )

* 1945 – World War II: Hiroshima, Japan is devastated when the atomic bomb " Little Boy " is dropped by the United States B-29 Enola Gay.

* 1945 – Ron Jones, English director ( d. 1993 )

* 1945 – Andy Messersmith, American baseball player

* 1945 – World War II: Nagasaki, Japan is devastated when an atomic bomb, Fat Man, is dropped by the United States B-29 Bockscar.

* 1945 – World War II: The Soviet Union declares war on Japan and begins the Manchurian Strategic Offensive Operation.

* 1945 – Barbara Delinsky, American author

* 1945 – Aleksandr Gorelik, Russian figure skater ( d. 2012 )

* 1945 – Posy Simmonds, English cartoonist

* 1866 – Giovanni Agnelli, Italian businessman, founded Fiat S. p. A ( d. 1945 )

* 1945 – Lars Engqvist, Swedish politician

* 1945 – Robin Jackman, English cricketer

* 1897 – Karl-Otto Koch, German SS officer ( d. 1945 )

* 1945 – Ten days after World War II ends with Japan announcing its surrender, armed supporters of the Communist Party of China kill Baptist missionary John Birch, regarded by some of the American right as the first victim of the Cold War.

On June 30, 1945, before ENIAC was made, mathematician John von Neumann distributed the paper entitled First Draft of a Report on the EDVAC.

* 1945 – John Banville, Irish novelist and journalist

John Sloan Dickey, serving as president from 1945 until 1970, strongly emphasized the liberal arts, particularly public policy and international relations.

Among notable recipients below flag rank are: X-1 test pilot Chuck Yeager and X-15 test pilot Robert M. White, who both received the DSM as U. S. Air Force majors ; Air Force Major Rudolf Anderson, the U-2 pilot shot down during the Cuban Missile Crisis ; director Frank Capra, decorated in 1945 as an Army colonel ; actor James Stewart, decorated in 1945 as an Army Air Forces colonel ( later Air Force Brigadier General ); Col. Wendell Fertig, who led Filipino guerrillas behind Japanese lines ; Col. ( later Major General ) John K. Singlaub, who led partisan forces in the Korean War ; and Maj. Maude C. Davison, who led the " Angels of Bataan and Corregidor " during their imprisonment by the Japanese, and Colonel William S. Taylor, Program Manager Multiple Launch Rocket System.

* 1945 – John Helliwell, English musician ( Supertramp )

:* Sir John Boyd Orr ( UK ): October 1945 – April 1948.

* Sir John Summerson, Georgian London, ( 1945 ).

Built under the direction of John Mauchly and J. Presper Eckert at the University of Pennsylvania, ENIAC's development and construction lasted from 1943 to full operation at the end of 1945.

* John Ford ( Oklahoma politician ) ( born 1945 ), American political figure ; elected 2004 as Republican member of Oklahoma State Senate ; chairman of Education Committee

* 1945 – John Motson, English sportscaster

* 1945 – John Leslie, American porn actor and filmmaker ( d. 2010 )

* 1945 – John Derbyshire, English-American mathematician

* 1945 – John Garamendi, American politician

* 1885 – John Curtin, Australian politician ( d. 1945 )

* 1945 – John Fahey, Australian politician

* 1945 – John Lowe, English darts player

Sir John Ambrose Fleming FRS ( 29 November 1849 – 18 April 1945 ) was an English electrical engineer and physicist.

* 1945 – John Fogerty, American singer-songwriter, guitarist, and producer ( Creedence Clearwater Revival and The Golliwogs )

* 1945 – John N. Bambacus, American politician

Merge sort is a divide and conquer algorithm that was invented by John von Neumann in 1945.

* 1945 – John Hessin Clarke, American lawyer and judge, U. S. Supreme Court Justice ( b. 1857 )

* 1916 – John Basilone, American marine and Medal of Honor recipient ( d. 1945 )