The hours are supposed to be released three months in advance but the hours for August have only just been released so September's will hopefully be available this time next month.
Disneyland Park and the Studio will both open at 10am. If you're staying onsite at a Disney hotel you can benefit from EMH (8am) at Disneyland park. The Disneyland park will probably shut at 7pm on that day and the Studios at 6pm.
I'm only guessing mind, so don't take it as gospel!!