They did the July 4th Military last year. They did it Memorial Day weekend too. And again for Veteran's Day.
Just have a Military ID, I am a spouse. For Memorial Day, our store just asked if you had anyone in the military and just took your word for it. I think because they were so busy that day and only had 2 people checking out. For the 4th, I believe it is July 1 - 7, 20% off your entire purchase, sales included...minus sewing machines as usual.