Maybe someone else has posted this, but I just looked it up.
For those of us (like me) who would prefer to avoid the possible chaos of Grad Nights:
Grad Nights at Disneyland
2014 Grad Nite DatesMay 16th
Sometimes I've been and it didn't seem too bad, even kind of enjoyed seeing all the HS graduates having a good time, other times it's been incredibly crowded, loud, and chaotic. I'll always remember the first Grad night that took us unawares. It was before the new front entrance was constructed at DCA, and everyone was being filtered out the temporary exit before California Soarin'. It was a mad mob scene, and took forever just to exit the park.