I have not idea
I've been going to this Goodwill for years and while they do have special events, I've never heard of dollar day. I second the above suggestion that you call them.
Middletown used to have $2 Tuesdays, when all the clothes would be $2. But I've noticed policy has changed from place to place now regarding Senior/Military discount s and special days. I suggest you call the store you plan to shop at.
Thanks! Your answer is awaiting moderation.