The following events occurred in the year 1991:
- Harry Potter finishes at his Muggle Primary School, at the age of ten. 
- Charlie Weasley and Nymphadora Tonks graduate from Hogwarts School of Witchcraft and Wizardry. 
- A Wizardry Budget is leaked and makes Daily Prophet headlines.
- 23 June: For Dudley Dursley's eleventh birthday, his parents, cousin Harry Potter, and Piers Polkiss go to the zoo. Harry speaks Parseltongue for the first time to a boa constrictor.
- 24 July: Harry Potter receives his first Hogwarts letter. Vernon and Petunia Dursley burn it. Harry's bedroom is moved from the Cupboard under the stairs to Dudley's second bedroom.
- 31 July: Quirinus Quirrell breaks into Gringotts Wizarding Bank, but fails to steal the Philosopher's Stone. Harry, on his eleventh birthday, goes to Diagon Alley for the first time with Rubeus Hagrid.
- 1 September: Harry Potter and his classmates – including Ron Weasley, Hermione Granger, Neville Longbottom, and Draco Malfoy – begin at Hogwarts.
- 12 September: Harry Potter becomes the youngest Seeker in a century for the Gryffindor Quidditch team.
- 31 October: During the Halloween feast at Hogwarts, a mountain troll is let loose by Professor Quirrell, who looks for the Philosopher's Stone. Harry Potter and Ron Weasley save Hermione Granger from the troll, and the three become friends. 
- 25 December: Harry receives his late father's Invisibility Cloak from Albus Dumbledore as a Christmas present. He also finds the Mirror of Erised and sees his family for the first time.
Individuals that started at Hogwarts
- Lavender Brown
- Fay Dunbar
- Seamus Finnigan 
- Hermione Granger 
- Neville Longbottom 
- Parvati Patil 
- Harry Potter 
- Dean Thomas 
- Ronald Weasley 
- Hannah Abbott 
- Susan Bones 
- Justin Finch-Fletchley 
- Wayne Hopkins 
- Megan Jones 
- Leanne 
- Ernie Macmillan 
- Oliver Rivers 
- Zacharias Smith
- Terry Boot 
- Mandy Brocklehurst 
- Michael Corner 
- Stephen Cornfoot 
- Kevin Entwhistle 
- Anthony Goldstein 
- Sue Li 
- Morag MacDougal 
- Padma Patil 
- Lisa Turpin 
- Millicent Bulstrode 
- Vincent Crabbe 
- Tracey Davis 
- Gregory Goyle 
- Daphne Greengrass 
- Draco Malfoy 
- Theodore Nott 
- Pansy Parkinson 
- Blaise Zabini 
- Another girl
Individuals who graduated from Hogwarts
- Arcturus Black III
- Magenta Comstock
- Perpetua Fancourt
- Tilly Toke
Behind the scenes
- 17 February: Bonnie Wright, the actress who portrays Ginny Weasley in the Harry Potter films, is born.
- 16 August: Evanna Lynch, the actress who portrays Luna Lovegood in the Harry Potter films, is born.
- 18 October: Toby Regbo, the actor who portrays a Young Albus Dumbledore in the Harry Potter films is born.
- 13 January: Genevieve Gaunt, the actress who portrays Pansy Parkinson in the film adaptation of Harry Potter and the Prisoner of Azkaban, is born.
|20th century : 1990s|
|1990 - 1991 - 1992 - 1993 - 1994 - 1995 - 1996 - 1997 - 1998 - 1999|
Notes and references
- ↑ Harry Potter and the Philosopher's Stone - Chapter 2 (The Vanishing Glass)
- ↑ Harry Potter and the Philosopher's Stone - Chapter 7 (The Sorting Hat)
- ↑ Harry Potter and the Philosopher's Stone - Chapter 10 (Hallowe'en)
- ↑ Harry Potter and the Philosopher's Stone - Chapter 11 (Quidditch)
- ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.19 5.20 5.21 5.22 5.23 5.24 5.25 5.26 5.27 5.28 5.29 5.30 Pottermore (transcription available here)
- ↑ 6.0 6.1 Harry Potter and the Philosopher's Stone