Once their work is out into the world, some creators let the thing free. J.K. Rowling is not one of those people. Very active on social media, Rowling often adds new little details about the Harry Potter universe or offers commentary on the events of the books and films. While this isn’t always well received, her commemorative tweets about the Battle of Hogwarts are always poignant. In the Potter world, the battle took place on May 2, 1998, and was the site of many beloved characters’ ends. Last year, she chose to apologize for the tragic death of Fred Weasley.