9 May is the 129th day of the year (130th in leap years). There are 236 days remaining until the end of the year.
- 1899: The Witches' League is founded, of which Lady Wimborne would become president.
- 1992: Harry and Hermione take Norbert to a tower for Charlie Weasley's colleagues to pick up. Malfoy receives detention for trying to catch them.