Disney announced today that Star Wars Episode VIII will now have a released date of December 15, 2017. Here is the official statement.
Star Wars: Episode VIII, originally scheduled for release on May 26, 2017, will now debut on December 15, 2017. The move follows the extraordinary success of Star Wars: The Force Awakens, which was the first Star Wars movie to premiere in December. In the popular holiday moviegoing corridor, it smashed numerous records, including biggest domestic and global debuts of all time as well as the biggest domestic second and third weekends, en route to becoming the highest grossing domestic release of all time with over $861M and the third biggest global release ever with $1.887B.
With the success that Disney had with The Force Awakens it makes sense for them to repeat the same schedule. And with Rogue One being released on December 16, 2016. Expect December to be Star Wars month for many years to come.