Multiple choice general knowledge science & technology The date & time the first Atomic bomb was tested? July 18, 1945 5:29:45 (Pacific Time) May 16, 1945 5:29:45 (Mountain Time) June 13, 1945 5:29:45 (Central Time) July 16, 1945 5:29:45 (Mountain Time) Reveal answer Fill a bubble to check yourself D Correct answer Explanation The Trinity test was the first detonation of a nuclear weapon, conducted by the US on July 16, 1945 at 5:29 AM. The test took place in the Jornada del Muerto desert in New Mexico, which is in the Mountain Time Zone.