Harry PotterThe opening date for “Harry Potter and the Half-Blood Prince” has changed again, but Muggles shouldn’t despair – this time, it’s moving up in the calendar.

Warner Bros. has announced that the sixth film in the J.K. Rowling series will now hit theatres on July 15, two days earlier than planned. The Wednesday release will give the movie a head-start on the weekend box office for a potentially huge five-day gross.

“Every day the kids are out of school in summer is just like an extra Saturday,” Dan Fellman, head of distribution at Warner Bros., told the AP on Tuesday.

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