1945 V-J Day, Japan surrenders unconditionally to end WW II (also August 15 depending on time zone).
Aboard the USS Missouri in Tokyo Bay, Japan formally surrenders to the Allies, bringing an end to World War II.
By the summer of 1945, the defeat of Japan was a foregone conclusion. The Japanese navy and air force were destroyed. The Allied naval blockade of Japan and intensive bombing of Japanese cities had left the country and its economy devastated. At the end of June, the Americans captured Okinawa, a Japanese island from which the Allies could launch an invasion of the main Japanese home islands. U.S. General Douglas MacArthur was put in charge of the invasion, which was code-named “Operation Olympic” and set for November 1945.