- Apr 1 Japanese troops conquer Jessami, Eastern India
- Apr 2 Palmiro Togliatti, leader of the Italian Communist Party returns to Italy from the Soviet Union
Music Premiere
Apr 2 Dmitri Shostakovich's 8th Symphony premieres in NY

Dmitri Shostakovich
- Apr 2 Soviet Army marches into pro-German Romania
- Apr 3 British dive bombers attack battle cruiser Tirpitz at KÃ¥fjorden, Norway
- Apr 3 US Supreme Court (Smith v Allwright) "white primaries" unconstitutional
- Apr 4 British troops capture Addis Ababa Ethiopia
- Apr 4 De Gaulle forms new regime in exile, with communists
- Apr 4 Allied Bucharest bombings targeting railroads kills 5,000
- Apr 5 140 Lancasters bomb aircraft factory in Toulouse
- Apr 5 World War II: 270 inhabitants of the Greek town of Kleisoura are executed by the Germans
- Apr 6 Jewish nursery at Izieu-Ain, France, overrun by Nazis
D-Day
Apr 7 World War II: General Montgomery speaks to generals at St. Paul's School about his vision for the upcoming D-Day landings
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Event of Interest
Apr 12 Lillian Hellman's "Searching Wind" premieres in NYC

Lillian Hellman
- Apr 13 South Carolina rejects black suffrage
- Apr 13 Stanley Cup Final, Montreal Forum, Montreal, Quebec: Montreal Canadiens beat Chicago Blackhawks, 5-4 in overtime for a 4-0 series sweep; Canadiens' first SC triumph since 1931
- Apr 13 Transport #71 departs Drancy (France) internment camp, taking 1,500 French Jews to Auschwitz concentration camp in Nazi German occupied Poland; an estimated 91 survived
- Apr 13 New Zealand and the Soviet Union establish diplomatic relations
- Apr 14 1st Jews transported from Athens arrive at Auschwitz
- Apr 14 Freighter "Fort Stikene" explodes in Bombay India, killing 1,376
Event of Interest
Apr 14 General Eisenhower becomes the Supreme Allied Commander of the Allied Expeditionary Force

Dwight D. Eisenhower
- Apr 14 Greek Colonel Venizelos forms government
- Apr 17 48th Boston Marathon won by Gerard Cote of Canada in 2:31:50.4; second straight victory; 3rd of 4 titles
- Apr 18 Leonard Bernstein & Jerome Robbins' ballet "Fancy Free" premieres in NYC
- Apr 19 Allied fleet attack Sabang Sumatra
- Apr 19 1944 NFL Draft: Angelo Bertelli from University of Notre Dame first pick by Boston Yanks
- Apr 20 Dutch Communist Party resistance fighter John Postma sentence to death
- Apr 20 NFL legalizes coaching from bench
- Apr 21 NFL Chic Cardinals & Pittsburgh Steelers merge (dissolves on Dec 3)
- Apr 22 Allies land near Hollandia, New Guinea
Event of Interest
Apr 22 Adolf Hitler & Benito Mussolini meet at Salzburg

Benito Mussolini

Adolf Hitler
Meeting of Interest
Apr 28 Soviet leader Joseph Stalin meets Polish-American priest Stanislaus Orlemanski in Moscow to discuss religion and the future of post-war Poland

Joseph Stalin
- Apr 28 Exercise "Tiger" ends with 750 US soldiers dead in D-Day rehearsal after their convoy ships were attacked by German torpedo boats off Slapton Sands, Devon.
- Apr 29 Raid by Dutch Resistance on the National Printing Office in The Hague to procure 10,000 Dutch identity cards.
- Apr 30 NY Giant Phil Weintraub gets 11 RBIs
- Apr 30 NY Giant, Mel Ott scores 6 runs in 1 game drawing 5 walks for 4th time