July 31 is an important day in the Wizarding world. Not only is it Harry Potter’s birthday—which, of course, before the age of 11 didn’t mean much of anything seeing as the Dursleys either forgot about it or knowingly ignored the day’s significance—but it’s also the day which Harry found out about his past, and with a single proclamation from Hagrid (“Harry—yer a wizard!”), his life was changed forever. If you ask the generation of readers who grew up alongside “the boy who lived”, they’ll tell you Harry’s story changed their lives, as well.