From Disney Parks Blog:

Last night April 25th 2013, a 180-foot-tall Mike Wazowski from the upcoming Disney●Pixar film “Monsters University” made the official announcement that we’re keeping three theme parks open for 24 hours on Memorial Day Weekend, the traditional start of the family travel season, to kick off a Monstrous Summer on both coasts. Wazowski, the loveable green-bodied, one-eyed monster, joins best pal James P. Sullivan (“Sulley”) in the prequel to “Monsters, Inc.”, this summer as college students with hopes of becoming Scarers.

Our first-ever, three-park all-night party is happening at the Magic Kingdom Park in Florida and Disneyland park and Disney California Adventure park in California. The parks will stay open from 6 a.m., May 24 to 6 a.m., May 25, 2013, local time.

In Florida, Magic Kingdom Park will feature a “Monsters University” theme where Mike and Sulley will be the Grand Marshals of the “Celebrate a Dream Come True” day parade and make appearances in Tomorrowland. There will be extra entertainment throughout the day and night, including characters in their pajamas in Town Square during the late night and early morning, and late-night dance parties in and around the courtyard of Cinderella Castle.

In California, you’ll be able to party the night away at both parks with special entertainment including: a “Monsters University” “TLT Monstrous” Dance Club and Star Wars characters in Tomorrowland and late-night Character Pajama Party in Mickey’s ToonTown at Disneyland park. The new Fantasy Faire Royal Theatre at Disneyland park will become a Royal Dance Hall late at night with a live band and dancing; and guests of Disney California Adventure park will find Monstrous photo opportunities with new “Monsters University” “Dorms” in Hollywood Land and a new “Monsters University” float leading the Pixar Play Parade.
Tonight, the huge sphere of Spaceship Earth was transformed from Disney Parks icon to Disney●Pixar “Eye-con” for the announcement.

Walt Disney World Resort President George Kalogridis joined Mike to share the news of the Monstrous Summer. “This summer, Disney Parks are bursting with a monstrous lineup of new thrills, shows and happenings,” he said. “Guests can start Memorial Day Weekend with a 24-hour-marathon of memory-making as three parks stay open all day and all night to celebrate the bi-coastal kick-off of our Disney Parks Monstrous Summer.”

All three parks will feature limited-edition specialty merchandise and food and beverage offerings plus other surprises throughout the entire day. Keep an eye on the Disney Parks Blog and the Monstrous Summer site for more details in coming weeks.