Universal has included the Wizarding World of Harry Potter on its official Gradbash website, suggesting that it plans to have the new land open by the time the event begins on April 23.
The website claims that graduating seniors who attend the events on April 23, 24 and 30 will be able to "step into" the new Potter land at Islands of Adventure. Universal has previously only revealed "Spring 2010" as its target opening date.
However, Universal has a shaky recent record of opening new attractions on time. Its Hollywood Rip, Ride, Rockit rollercoaster was due to open at Universal Studios Orlando in spring last year, but suffered a series of delays before finally opening in August. Therefore, TPT will continue to list Memorial Day (May 31, 2010) as the estimated opening date for the attraction on our New Attraction Watch - on the basis that Universal will likely pull out all the stops to get the Harry Potter land open prior to the key Memorial Day weekend.
Grad Bash is Universal's event exclusively for graduating seniors at U.S. high schools, and features late night opening and live music. Students can apply for their schools to be added to the admittance list through the Grad Bash website. Walt Disney World's Grad Nights 2010 event will also take place at the end of April.
Full details of the attractions, restaurants and shops that will form part of the Wizarding World of Harry Potter can be found in TPT's recent news story.
You can keep up to date with the latest confirmed and rumored opening dates for new attractions over at Theme Park Tourist's "New Attraction Watch" section.