Very interesting research, Cyprian.
From an Internet search --
Trinity Site - World's First Nuclear Explosion | Department ...
The world's first nuclear explosion occurred on July 16, 1945, ... Inspired by the poetry of John Donne,
J. Robert Oppenheimer code-named the test Trinity.
Trinity nuclear test
Trinity was the code name of the first detonation of a nuclear weapon. It was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project. The test was conducted in the Jornada del Muerto desert about 35 miles southeast of Socorro, New Mexico, on what was then the USAAF Alamogordo Bombing and Gunnery Range, now part of White Sands Missile Range.More at Wikipedia
Test site:Trinity Site, New Mexico