inluvwithdinsey -
There is no way to find out what September's hours will be. It is VERY frustrating when trying to make your PSes. It drives me insane.
One thing you can do is look at their hours from last year and assume around the same. You can find last year's hours on wwig.com. It may not be exactly right, but it's as close as your going to get until the official things comes out.
