The episode takes place around April 30, 1945.
The comics being perused in the tent are "Planet Comics" #25, #29, etc. (1940-1949) and are currently valued (ca. 2016) in very fine condition at about $2,000 each, whilst the #1 issue (Jan '40) is currently valued at about $26,000 for a Near Mint 9.6, and $39,000 for a perfect Gem grade 10.
The impression is given that Los Alamos and the Trinity test site are close to each other; while both are in New Mexico, they are over 200 miles distant from each other.