- Aug 1 Japanese city Toyama destroyed by B-29's
Sinking of the USS Indianapolis
Aug 2 After 3½ days suffering exhaustion, lack of water and shark attacks in the Philippine Sea, the surviving crew of USS Indianapolis are spotted by Wilbur “Chuck” Gwinn, a PV-1 Ventura pilot on a routine sector search. 316 had survived.
Potsdam Conference
Aug 2 Potsdam Conference between Joseph Stalin, Harry Truman and Winston Churchill (replaced by Clement Attlee after losing the 1945 general election) ends
Nelson's Record PGA Victory
Aug 4 American golfer Byron Nelson wins Canadian Open at Uplands & Thornhill CC for a record 11th consecutive PGA victory, on way to record season tally of 18
- Aug 4 Red Sox outfielder Tom McBride drives in MLB record tying 6 runs in an inning (4th) during 15-4 win v Washington
Atomic Bombing of Hiroshima
Aug 6 Atomic bomb dropped on the Japanese city of Hiroshima by the US B-29 Superfortress "Enola Gay"
4th Victory Test
Aug 6 Australian Test cricket all-rounder Keith Miller scores 110 not out for Australian Services on Day 1 of drawn 4th Victory Test against England at Lord's
- Aug 8 England & Australian Services draw 4th Victory Test
United Nations Charter
Aug 8 President Harry Truman signs the United Nations Charter
Nuremberg Trials
Aug 8 US, USSR, Britain and France sign Treaty of London which sets down procedures for the Nuremberg war trials of Nazi leaders
- Aug 8 USSR declares war against Japan in WW II
- Aug 8 USSR establishes a communist government in North Korea
Nuclear Bombing of Nagasaki
Aug 9 US drops second atomic bomb "Fat Man" on Nagasaki, Japan, destroying part of the city
Japan Willing to Surrender
Aug 10 Japan announces willingness to surrender to Allies, provided Emperor Hirohito's status remains unchanged
- Aug 11 Allies refuse Japan's offer to surrender on the condition that Emperor Hirohito retains his status
- Aug 12 Emperor Hirohito of Japan informs the imperial family that he has decided to surrender
Viet Minh Launches Uprising
Aug 14 Ho Chi Minh's Viet Minh movement launch a coordinated uprising against French rule across Vietnam following the Japanese surrender
Potsdam Declaration
Aug 14 Japan's government notifies the Allies that it has accepted the Potsdam Declaration
Victory over Japan
Aug 14 V-J Day, the Empire of Japan surrenders unconditionally to the Allies, ending World War II (August 15 in Japan and other countries depending on the time zone)
- Aug 15 A riot ensues in San Francisco while the city is celebrating the end of WW II
- Aug 15 Chandler sells World Series radio rights for $150,000 to Gillette, Ford had been World Series sponsor since 1934, pay $100,000 annually
- Aug 15 US wartime rationing of gasoline and fuel oil ends
- Aug 15 Victory over Japan Day, Surrender of Japan marks the end of World War II (August 14 in the Americas due to the time zone difference)
- Aug 15 World War II: Korean Liberation Day
- Aug 16 Puyi, the last Chinese Emperor and ruler of Manchukuo is captured by Soviet troops
- Aug 17 Korea is divided into North and South Korea along the 38th parallel
Foxx's 1st Seven Innings Pitch
Aug 19 Phillies Jimmie Foxx, 37, pitches 1st 7 innings vs Reds & wins
- Aug 20 17-year-old Dodgers utility Tommy Brown becomes youngest player to hit a MLB home run in Brooklyn's 11-1 rout of Pittsburgh Pirates at Ebbets Field
- Aug 20 Soviet troops occupy Harbin & Mukden
- Aug 21 US President Harry Truman ends Lend-Lease program
- Aug 22 Bob Cristofani scores 110 for Aust Services at Old Trafford
Sigh No More
Aug 22 Noël Coward's revue "Sigh no More" premieres in London
- Aug 22 Vietnam conflict begins as Ho Chi Minh leads a successful coup
Feller's Post War Return
Aug 24 MLB Cleveland Indians ace Bob Feller returns from serving in the US Navy and strikes out 12
Occupation of Japan
Aug 29 General MacArthur named Supreme Commander of Allied Powers in Japan
- Aug 30 12th NFL Chicago All-Star Game: Green Bay 19, All-Stars 7 (92,753)
Shostakovich's 9th Symphony
Aug 30 Dmitri Shostakovich completes his 9th Symphony
- Aug 30 Hong Kong liberated from Japanese control
- Aug 30 US General Douglas MacArthur lands in Japan
Liberal Party Founded
Aug 31 The Liberal Party of Australia is founded by Robert Menzies