What happen to the 3rd wed. in july?


I haven't been to the site in I guess a while but we here at Bose (yeah the pseaker people) have been doing the 3rd wed. in July for about 5 years. We are doing it again tomorrow July 15th with a group of hopfully 20.
Just wondering are we now on the wrong schedule?
No matter here in new england we haven't really started summer yet so anytime is good.