Germany had already surrender during World War 2 but Japan did not concede until a few months later after the allies brought the full weight of their power to the venture. Japan actually surrendered on August 14th, 1945 but it was not released to the press until August 15th so many people celebrate August 15th as V-J Day. The formal surrender was received on the the USS Missouri on September 2nd, 1945 closing out the end of one of the darkness times of humanities history.
How to celebrate – Remember those who gave their lives for freedom. Read about the war with Japan. See if you had any family members who fought against Japan.