In the book Will You Miss Me When I'm Gone?, a biography of the Carter Family, there is a reproduction of a poster from the Carters' early years. It reads:
Will give a
AT Roseland Theater
ON Thursday August 1
This Program is Morally Good
Admission 15 and 25 Cents
A.P. CARTER, Mace [sic] Spring, Va.
A couple of things to note about this: First, the Carters' hometown was Maces Spring, not Mace Spring. Second, the author doesn't give a year for the poster, but it's probably 1929. The only other real choice is 1935; those are the only years between 1918 and 1940 that August 1st fell on a Thursday.
But most importantly, how great it is that they advertised "This Program is Morally Good"? I wish I had thought of that as a slogan for OPC: "This Blog is Morally Good."