F.H.
My opinion is probably not a good idea. You are in TX and its hot. Im in AZ and its hot. We don't go to any garage sales in the summer, its just too hot. And people are going to be either getting ready to have a party or go to a party so I don't think they will be thinking about garage sales. And most people that DO go to garage sales, they go to more than one and I don't think anyone else is having one that day so you won't get many people unless you advertise in the paper. I would wait to do it right after the 1st or 15th which is people's pay days. Good luck.