SquareZ
The adult who puts his arm around his companion in the ballroom, and the child in the roadway, skipping in a round dance -- they forget themselve, they dissolve the weight of earthly contact and the rigidity of daily existence.
--Curt Sachs
Calling Ideas for June 18, 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.