SquareZ
[Dance] combines utilization of the body, mind and, most essentially, the spirit. If you are looking for it all, dance is where you can find it.
--Joy of Motion Dance Studio
Calling Ideas for June 1, 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.