December 3 is the 337th day of the year (338th in leap years). There are 28 days remaining.
- 1992 - Hermione Granger continues brewing Polyjuice Potion in the 2nd Floor Girls' Lavatory.
- 1995 - Ron Weasley and Hermione Granger's Prefect duties become more onerous: they must supervise castle decoration, first- and second-years on their breaks, and patrol the corridors at night.