31 July is the thirty-first day of July.
- 1980: Harry Potter is born
- 1981: Lily Potter and James Potter get killed by Lord Voldemort
- 1991: Rubeus Hagrid, a beetle-eyed man, rescues Harry Potter from the Dursley family
- 1992: Mr. Mason and Mrs. Mason visit the Dursley Family while Dobby splats a cake on Mrs. Mason
- 1993: Harry's "aunt" Marge Dursley visits the Dursley's
- 1994: Harry recieves four birthday cakes from Hermione Granger, Ron Weasley, Sirius Black and Rubeus Hagrid
- 1996: Harry visits the Burrow