That's the Cat!
In about two hours' time I got a lot of valuable advice!
Some combinations I tried, naturally; but songs containing only the merry month of May without a date I found a lot, but they don't fit my purpose. The songs with a fixed date I shall incorporate into my calendar in the next days - I'm just back from a short but heavy bout and have to work next morning.
Thanks y'all, and y'all invited to tell me more. But remember: only dates with month and day are needed,

Sing and enjoy
Wilfried