Depending on which history book you read, World War II officially ended on three different dates 70 years ago. If you live in the United Kingdom, V-J Day (victory over Japan) is celebrated Aug. 14. Or was it Aug. 15, as it is noted (not celebrated) in Japan? In the U.S., however, V-J Day is celebrated Sept. 2, the day Japanese notables were brought aboard the USS Missouri in Tokyo Bay to sign the official document of surrender.