On October 2, 2013 Disney's Hollywood Studios will be open from 9:00am to 6:00pm. The reduced hours are due to a special event being held for the American Nurses Association, between 7:30pm and 11:00pm.
According to Orlando Park News, the special event will see 6,000 nurses and nursing executives gather for discussions. The event will be offering free food and drinks as well as a private Fantasmic! showing, and numerous character appearances.
Normal opening hours will resume on October 3, 2013.