After Labor day
Disneyland goes back to regular hours.
M-F DL at least 10 am (maybe as early as 9) til 8 pm
Fri DL at least 10 am (probably 9, and could be as early as 8) til at least 11 pm (though probably midnight)
Sat DL at least 9 am (probably 8) til midnight (may be 11 though I doubt it)
Sun DL at least 10 am (probably 9, and maybe even 8) till at least 10 pm (probably 11)
M-F DCA 10 am til 6 pm
Fri DCA 10 am til at least 8 pm (though probably 9, and could be 10)
Sat DCA 10 (could be 9 am, but this is rare in regular season) til at least 8 (could be as late as 10)
Sun DCA at least 10 am (could be 9 am, but this is rare in regular season) till at least 8 pm (could be as late as 10)
I would expect the earliest hours possible. The times will probably be coming out in the next couple months, but this is a general idea.
Electrical parade will probably only be on the weekends. If they are showing Fantasmic and/or Fireworks the will probably only be on the weekends. Usually in September the show either fireworks or Fantasmic, (usually not both, but sometimes they do), and sometimes they show neither.