20 April is the 110th day of the year (111th in leap years). There are 255 days remaining until the end of the year.
- 1912: Bram Stoker, the muggle author of Dracula, dies.
- 1994: The Committee for the Disposal of Dangerous Creatures holds a hearing on the fate of the hippogriff Buckbeak.
- 1996: Dumbledore's Army learns how to cast Patronuses. Marietta Edgecombe denounces the meeting to Dolores Umbridge. Albus Dumbledore takes the blame for the illicit organisation. Cornelius Fudge tries to arrest him, but he Stuns him, Umbridge, Dawlish, Kingsley Shacklebolt, Percy Weasley and flees.
- 1997: Aragog dies after contracting an illness.
- 1998: Harry Potter, Ron Weasley and Hermione Granger — amongst others — stay at Shell Cottage and prepare to break into the Lestrange Vault in Gringotts Wizarding Bank.
Behind the scenes
- 1924: Leslie Phillips, who provided the voice of the Sorting Hat in the film adaptation of Harry Potter and the Philosopher's Stone and the film adaptation of Harry Potter and the Chamber of Secrets, is born.