DLR typically releases their operating calendar 45-days in advance, so that's when we'll start to see the first information about closures. That being said, it's possible that refurbishments will be added at the last minute. At this point, I think it's pretty likely that Haunted Mansion will be closed for the early part of September (re-opening with the start of HalloweenTime) and Space usually closes for a couple of days before the start of HalloweenTime (they usually release HalloweenTime information in mid-September).