20 October is the 293rd day of the year (294th in leap years). There are 72 days remaining until the end of the year.
- 1995 - Dumbledore's Army meetings continue undetected: Neville Longbottom succeeds in disarming Hermione Granger, and Parvati Patil was able to reduce a table to dust.
Behind the scenes
- 1944: Veronica Clifford, who played Mrs. Mason in the film version of Harry Potter and the Chamber of Secrets, is born.