Was just checking the newly released operating schedule for May and June for the parks, and Disney has expanded the hours of operation due to the larger 50th Anniversary Crowds.
But with the extended hours, it is making more of the Grad Nites to force the park to close early on those days.
There is no conflicts prior to Memorial Day, as Disneyland is operating from 9 AM to 9 PM Monday thru Thursday all month. (DCA is open 10 AM to 7 PM).
But on Memorial Day, plus the Tuesday and Wednesday (30th and 31st), Disneyland is open 9 AM to 10 PM, but Thursday June 1st it is 9 AM to 9 PM due to the Grad Nite.
The week of June 5th, Disneyland is open 9 AM to 11 PM Monday thru Wednesday, but closes at 9 PM on Thursday the 8th due to Grad Nite.
Starting Friday, June 10th, Disneyland is going to the full Peak Summer hours, 8 AM to Midnight, except for the Grad Nites and Pirates Movie Premiere Night.
So we have 9 PM closing on June 14th, 15th, 21st and 22nd due to Grad Nites.
Also, expect some changes to the normal Early Entry Days on June 15th and 22nd. I would contact Disney just prior to your trip, or stop at City Hall when you arrive to see what days they will offer the feature.
On Saturday June 24th, Disneyland will open at 6:30 AM, but close at 5 PM due to the movie premiere.
Over at DCA, they will remain at the off-season openings of 10 AM to 7 PM during the week thru June 15th, before switching to Hours of 10 AM to 9 PM daily on Friday, June 16th. DCA will go to Peak Summer Hours of 10 AM to 10 PM on Friday, July 1st.
DCA remains open to 11 PM on Saturday the 24th to allow folks who can't go to Disneyland due to the movie premiere a place to go to.