VJ Day, or Victory over Japan Day, marks the day in August 1945 when Japan surrendered, bringing an end to World War II. The main events took place on August 14 and 15, 1945, depending on the time zone. On August 14, U.S. President Harry S. Truman announced Japan's unconditional surrender, and the following day, August 15, Japanese Emperor Hirohito broadcasted the surrender to the Japanese people. This cessation of hostilities ended the long and devastating global conflict that lasted nearly six years. The official VJ Day date varies by country:

• In the United Kingdom and many Commonwealth countries, it is commemorated on August 15.
• In the United States, the formal surrender signing occurred later on September 2, 1945, aboard the USS Missouri in Tokyo Bay, which is the official VJ Day date in the U.S.

VJ Day signifies not just the celebration of victory, but also a solemn remembrance of those who fought and lost their lives during the war. It marked the beginning of a new era of peace after the deadliest conflict in history. The day is commemorated with ceremonies, parades, and moments of reflection in various countries, honoring the sacrifices made during World War II and the end of the war in the Pacific theater. In summary, VJ Day is the day that marks Japan's surrender in World War II and the end of the war globally, with key dates being August 14-15, 1945 for the announcement and September 2, 1945 for the formal signing of surrender documents.