17 October is the 290th day of the year (291st in leap years). There are 75 days remaining until the end of the year.
- Year Unknown: Filius Flitwick, Charms Master at Hogwarts School of Witchcraft and Wizardry, is born.
Behind the scenes
- 1960: Guy Henry, the actor who plays Pius Thicknesse in Harry Potter and the Deathly Hallows: Part 2, is born.