Harry Potter and the Sorcerer’s Stone (1999)

In-fiction date: 7/31/1990

On Harry Potter's eleventh birthday — July 31st — Hagrid tracks him down to a remote seaside shack where his aunt and uncle have been hiding him from a stream of Hogwarts letters, and delivers the news his family has suppressed: his parents were murdered by Voldemort, Harry somehow survived and became famous throughout the wizarding world, and he himself is a wizard.