December is the twelfth and last month of the year. It's one of the months of the year with thirty-one days.
- December 1995: Postmortem analysis reveals that a series of notes Albus Dumbledore wrote before his death regarding The Tales of Beedle the Bard were completed around this time, approximately eighteen months before his death in June of 1997.
- 24 December (Christmas Night)
- 1997: Harry and Hermione visit Godric's Hollow and get attacked by Nagini impersonating Bathilda Bagshot.
- 6 December — Rubeus Hagrid; Griselda Jorkins
- 12 December — Charlie Weasley
- 31 December — Tom Marvolo Riddle