1937
See Wikipedia for what was happening around the world in 1937.
Here are some Old Time Radio episodes that aired in 1937:
Speed Gibson of the International Secret Police
The Octopus Gang Active [Part 1 of 178] see more episodes
1937-01-02 (2.72 MB) [11:54]
True Detective Mysteries
Rattlesnake and Barefoot Bride
1937-03-08 (5.73 MB) [25:03]
True Detective Mysteries
Horror In The Hospital Ward
1937-03-25 (5.7 MB) [24:54]
Plus 1 more episodes locked away in the Random Dispenser!