On Prairie Home Companion for April 8, there was a skit involving a wildly-improbable movie musical about a soldier who hits the beach on D-Day with a guitar instead of a rifle. His name is Dennis Day, so the back of his helmet is stenciled "D.DAY"...
(I don't know why Garrison didn't use some other "D" first name.)
Earlier, on the same station, I guess it was "Weekend All Things Considered" that had a feature on innovative Senior Citizen programs. One of the participants in that, if I heard correctly, was named Dennis Day as well!