How long will the 4th sale be active?
At least through July 4. 
Honestly I’m not sure. From what I can remember they usually run it for a day or two afterwards. Don’t quote me on that though.
Jump on it if you want it. I scored a couple complete blemmed lowers (with free shipping) for about the cost of stripped ones. My FOMO wouldn’t allow me to pass on those. Blemmed uppers for Labor Day??? 
Like GuitarGuy said, we usually run the sale a day or two past the actual holiday. My guess is that the sale will change on Tuesday morning.
Thanks… I jumped on two lowers while I could