7 December is the 341st day of the year (342nd in leap years). There are 24 days remaining.
- 1926: Credence Barebone, while in his Obscurial form, destroys the Second Salem Church and kills Chastity and Mary Lou Barebone.
- 1992: Hermione Granger continues brewing Polyjuice Potion in Moaning Myrtle's Bathroom. Professor Minerva McGonagall takes the name of those staying at Hogwarts during the holidays.
- 1994: Rita Skeeter turns up at a Care of Magical Creatures lesson and takes an interest in Hagrid. Later, Hermione leads Ron and Harry down to the kitchens, where she reveals that Dobby and Winky have now come to work at Hogwarts.
- 1995: Ron and Hermione's prefect duties become more onerous: they must supervise castle decoration, patrol the corridors at night and supervise first and second years on their breaks.