SquareZ
No dancer can watch Fred Astaire and not know that we all should have been in another business.
--Mikhail Baryshnikov
Calling Ideas for June 7, 2012

June is:

National Accordian Awareness Month
National Accordion Awareness Month was established in 1989 to promote the accordion, help spread the word about the resurgence in popularity in the accordion and to educate people about the accordion. Here's some info.

I'm sure there are bunches of (old) square dance records that feature the accordian. I tend to associate MacGregor with accordian arrangements.