ANAHEIM, Calif. and LAKE BUENA VISTA, Fla., April 25, 2013 /PRNewswire/ -- Walt Disney World Resort and Disneyland Resort will kick off a Monstrous Summer by keeping three theme parks open for 24 hours nonstop on Memorial Day Weekend, the traditional start of the family travel season. The Magic Kingdom Park in Florida and Disneyland Park and Disney California Adventure Park in California will stay open from 6 a.m., May 24 to 6 a.m., May 25, 2013, local time* marking the beginning of a summer of fun inspired by the upcoming Disney•Pixar comedy adventure Monsters University. The oversized fun of a 24-hour Disney park "All-Nighter" called for an equally epic announcement, and the huge sphere of Spaceship Earth was transformed from Disney Parks icon to Disney•Pixar "Eye-con," becoming a 180-foot-tall, fully animated Mike Wazowski, the loveable green-bodied, one-eyed monster who joins best pal James P. Sullivan ("Sulley") in the prequel to Monsters, Inc., this summer as college students with hopes of becoming Scarers . Walt Disney World President George Kalogridis joined Mike to share the news of the first-ever, three-park All-Nighter. "This summer, Disney Parks are bursting with a monstrous lineup of new thrills, shows and happenings," said Kalogridis. "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 a Monstrous Summer at Disney Parks." Mike and Sulley will take a break from collegiate life and their Scare studies at Monsters University to host the All-Nighter, dropping in to scare up some school spirit. Guests will scream and giggle with delight at the lineup of thrills and entertainment that promises to make this a day and night to be remembered for a lifetime.