While I was perusing a "Scottish Society" website, I came across a purported origin for the practice of "Kirking the Tartan" that tied it to Scotland during the Jacobite era. That seemed a little questionable, so the best explanation was one that I found was on the Clan Campbell Society (North America) website here:

http://www.ccsna.org/jsep30.htm

Do any of you know of any source documentation for this practice that predates the 1940s in the US?

For those you in Scotland, have you ever heard of this practice?

Cordially,

David