For the initial U.S. announcement of Japan's surrender, what date was called V-J Day?

The initial U.S. announcement of Japan's surrender was called V-J Day on August 14, 1945.

President Harry S. Truman announced the surrender in the United States on the evening of August 14, using the date in U.S. time. Because Japan was across the International Date Line, the announcement was heard there on August 15.

The date can be confused with September 2, 1945, when Japan formally signed the surrender document aboard USS Missouri. August 15 is also the principal remembrance date in Japan and the official V-J Day in the United Kingdom. Thus, several dates appear in historical accounts, depending on whether they refer to the announcement, local time, or the formal ceremony.

The announcement ended major combat in the Pacific, but legal and diplomatic settlements continued afterward. Japan signed the Treaty of San Francisco in 1951, and it came into force in 1952 for most Allied countries.