1951
See Wikipedia for what was happening around the world in 1951.
Here are some Old Time Radio episodes that aired in 1951:
Duffy's Tavern
A Lady Visits the Draft Board
1951-01-12 (6.52 MB) [28:29]
Our Miss Brooks
Business Course
1951-02-11 (13.5 MB) [29:29]
Tales of the Texas Rangers
Blind Justice
1951-03-11 (6.97 MB) [30:27]
The Adventures of Nero Wolfe
The Final Page
1951-03-23 (13.39 MB) [29:15]
The Adventures of Nero Wolfe
The Tell-Tale Ribbon
1951-03-30 (13.32 MB) [29:05]
The Adventures of Nero Wolfe
The Lost Heir
1951-04-20 (13.4 MB) [29:17]
The Adventures of the Falcon
The Case of the Flaming Club
1951-05-06 (5.61 MB) [24:29]
The Whisperer
The Woman On Ice
1951-09-09 (6.69 MB) [29:13]
The Whistler
A Matter Of Patience
1951-09-16 (6.82 MB) [29:47]
Barrie Craig, Confidential Investigator
Death And The Purple Cow
1951-12-12 (7.01 MB) [30:37]
Plus 259 more episodes locked away in the Random Dispenser!