SquareZ
When the song is perfect and the call is perfect and the square is perfect, life doesn't get any better.
--Eddie Careri (Times Squares)
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.