Some newspapers of this era published their Spirit sections on days other than Sunday. This edition was published by the Chattanooga (Tennessee) Evening Times on Saturday, December 20, 1941, one day before it appeared in most other newspapers. See individual indexes for the actual dates of publication.
This issue is a variant of
The Spirit (Register and Tribune Syndicate, 1940 series) #12/21/1941.
There exist further variants: