Nothing appears to me to give the children so much becoming confidence and behavior, and so to raise them to the conversation of those above their age, as dancing. I think they should be taught to dance as soon as they are capable of learning it, for, though it consist only of outward gracefullness of motion, yet I know not how, it gives children manly thoughts and carriage more than any thing.
--John Locke
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.