DLR posts hours about 4-8 weeks out. It is different from WDW in this regard because DLR does not take dining reservations 180 days in advance. Only 60 days. And even then they are not that popular.
You can get a pretty good idea of hours and entertainment later this year by looking at past years. August will have maximum hours and entertainment up through August 21 as in the past, and maximum hours or close to maximum through Labor Day.
See "Historical DLR Park Hours, Entertainment and Refurbs" -
www.disboards.com/showthread.php?t=2291124