A daily description of events in the summer of 1945, touching points around the world but centered (as that summer was) on the Trinity nuclear test. This episode has daily events for the week ending Saturday July 7th, 1945.
Sunday, July 1,1945 - 15 Days Before Trinity
https://en.wikipedia.org/wiki/Type_C4-class_ship
http://ww2troopships.com/crossings/1945b.htm
https://history.army.mil/books/wwii/7-8/7-8_7.HTM
http://www.yeide.net/World_War_II_History/Cavalry_Histories.html
Monday, July 2,1945 - 14 Days Before Trinity
https://en.wikipedia.org/wiki/William_Sterling_Parsons Captain William Parsons, US Navy - head of Project Alberta, which is the part of the Manhattan Project focused on delivering the bomb to it’s target.
https://en.wikipedia.org/wiki/Thomas_F._Farrell - Brigadier General Thomas Farrell, who is “Grove’s deputy for operations”
https://en.wikipedia.org/wiki/William_R._Purnell - Rear Admiral William Purnell is Navy liason to manhattan project, also the Navy’s deputy chief for materiel.
http://www.dannen.com/decision/testdate.html
The "IT" mentioned a couple of times there appears to be the Little Boy device, which was going to be transported to Tinian aboard the USS Indianapolis (then finishing repairs in the San Franciso area), and which Parsons was coordinating with Purnell.
Tuesday, July 3,1945 - 13 Days Before Trinity
https://automotivehistory.org/july-3-1945-ford-starts-postwar-production/
https://vtauto.org/1946-ford-tudor/
https://www.trumanlibrary.gov/photograph-records/64-57-01
Wednesday, July 4,1945 - 12 Days Before Trinity
https://www.nationalww2museum.org/war/articles/truman-independence-day-message-1945
https://www.trumanlibrary.gov/library/public-papers/72/statement-president-fourth-july
Thursday, July 5,1945 - 11 Days Before Trinity
https://en.wikipedia.org/wiki/1945_United_Kingdom_general_election
Friday, July 6,1945 - 10 Days Before Trinity
https://www.nationalww2museum.org/war/articles/delivering-atomic-bombs-silverplate-b-29
https://nuclearweaponarchive.org/Usa/EnolaGay/EnolaGay.html
Saturday, July 7,1945 - 9 Days Before Trinity
http://www.brigs.us/Phila/Candids1.htm — photographs from USS Philadelphia
http://www.brigs.us/Phila/reunion-files/and-we-were-there-Truman-Potsdam.htm - a first-person account of the trip
https://prologue.blogs.archives.gov/2014/08/14/truman-bacall-and-that-photograph/
https://www.history.navy.mil/content/history/nhhc/our-collections/photography/numerical-list-of-images/nara-series/80-g/80-G-600000/80-G-603322.html