1941
See Wikipedia for what was happening around the world in 1941.
Here are some Old Time Radio episodes that aired in 1941:
Fibber McGee and Molly
The McGees Throw A Dinner Party
1941-03-04 (6.73 MB) [29:24]
Fibber McGee and Molly
Party Guests Quarantined From Teeny's Measles
1941-03-11 (6.66 MB) [29:06]
Fibber McGee and Molly
A Night Out With The Boys
1941-04-22 (6.55 MB) [28:38]
Cavalcade of America
Trials and Triumphs of Horatio Alger
1941-05-05 (12.81 MB) [27:59]
Cavalcade of America
Theodosia Burr
1941-05-12 (13.07 MB) [28:33]
Cavalcade of America
Johns Hopkins
1941-05-26 (6.25 MB) [27:19]
Fibber McGee and Molly
Leaving For Hollywood
1941-06-24 (6.59 MB) [28:49]
Cavalcade of America
Jean Pierre Blanchard
1941-06-30 (6.76 MB) [29:32]
The Great Gildersleeve
The Canary Won't Sing
1941-11-30 (6.83 MB) [29:50]
Mr. District Attorney
The Museum Mystery
1941-12-10 (6.28 MB) [27:28]
Plus 32 more episodes locked away in the Random Dispenser!