Aberforth Dumbledore travels back in time from July 1999 to 1980 in the hopes of kidnapping Sybil Trwlawney before she can make her first prophecy, but he arrives an hour late and a galleon short from even stopping Severus Snape from eavesdropping. Neville Longbottom is born on 30th and Harry Potter is born on the 31st, marking both of them as possible vanquishers of Lord Voldemort.
Regrouping after failing his original objective, Aberforth turns his attention to Peter Pettigrew. He rationalizes that kidnapping, imperiusing, and then oblivating the young man was certainly the least of his crimes if it will keep the younger man from betraying his friends.
The Fidelius Charm is cast to hide the Potters.
Unable to get to the Potters, Voldemort turns his attention to the Longbottoms. Augusta Longbottom is babysitting her grandson when the Dark Lord decends upon their home. The witch puts up a valient fight, but she is felled by the Killing Curse. When Voldemort casts the same curse against the toddler, it rebounds and (seemingly) vanquishes the dark lord. Neville Longbottom is hailed by the wizarding world as the Boy Who Lived.
With his major objective complete, Aberforth returns to his own time, but not before leaving information about the existance of Voldemort's horcruxes with his brother.
Acting on the information left by Aberforth, Albus Dumbledore, with the help of the Mauders, finds Rowena Ravenclaw's Diadem in the Room of Requirement. It is destroyed with the sword of Godric Gryffindor.
Bolivian National Team wins the 419th Quidditch World Cup.
Slytherin's Locket is found and destroyed
Portuguese National Team wins the 420th Quidditch World Cup.
Marvolo Gaunt's Ring is found and destroyed
Alice Longbottom is able to successfully claim legal right to the Lestrange vaults through her mother’s bloodline (Alice’s mother being maternal aunt to Rodolphus and Rabastan). The Order is successfully able to destroy the horcrux contained in Helga Hufflepuff’s Cup.
421st Quidditch World Cup is held. After a five-day-long final, Canada defeats Scotland. In a post-match interview, Scottish Seeker Hector Lamont famously blames his father, "Stubby" Lamont, for not giving him longer fingers.
Cornelius Fudge becomes Minister for Magic.
Neville Longbottom, Harry Potter, Draco Malfoy and their cohort start their first year at Hogwarts and are sorted into their Houses.
During the Halloween feast at Hogwarts, a mountain troll is let loose in the dungeons. The culprit is eventually found to be a group of seventh years.
Nicholas Flamel, the famed alchemist, visits Hogwarts and guest lectures in several classes.
Ginny Weasley, Luna Lovegood, and Colin Creevey and their cohort start their first year at Hogwarts and are sorted into their Houses.
The Chamber of Secrets is reopened by [Student] under the influence of Tom Marvolo's Diary.
The Halloween Feast and 500th Deathday for Nearly Headless Nick. The Basilisk from the Chamber of Secrets attacks its first victim: Argus Filch's cat, Mrs. Norris.
Colin Creevey is Petrified by the Basilisk.
Justin Finch-Fletchley and Nearly Headless Nick are petrified by the Basilisk.
The British Ministry of Magic conducts a raid on Malfoy Manor, but fails to find any dark artefacts.
[Student] is discovered to be under posession of the Dairy. It and the Basilisk in the Chamber of Secrets are destroyed.
Petrified students are cured and resume their studies.
Remus Lupin, current Defense Agaist the Dark Arts professor at Hogwarts, is found out to be a werewolf. After a lengthy battle involving the press, the Ministry, and the Hogwarts Board of Governors, it is decided that because of his excellent teaching record and with ready access to the wolfsbane potion he poses little threat to the student population. He is able to keep his position
International Confederation of Wizards' Conference is held in Bern, Switzerland.
The 422nd Quidditch World Cup final is held in England, between Ireland and Bulgaria. The Irish National Quidditch team defeats the Bulgarian National Quidditch team 170 to 160, though Bulgarian Seeker Viktor Krum captures the Golden Snitch. Afterward, a neo-Death Eater riot breaks out and the Dark Mark is cast into the sky.
At the Welcoming Feast, Hogwarts Headmaster Albus Dumbledore announces that they would be playing host to the Triwizard Tournament. Preparations are made for the arrival of the delegations from the Beauxbatons Academy of Magic and the Durmstrang Institute.
The delegation from Beauxbatons arrives in a large carriage pulled by Abraxan horses. The delegation of Beauxbatons pupils are led by their Headmistress, Madam Olympe Maxime. Shortly after their arrival, the delegation from Durmstrang, under the watchful eye of their High master Professor Igor Karkaroff, arrives in a magical ship that could travel underwater.
The Goblet of Fire selects the champions for the Triwizard Tournament, held for the first time in centuries at Hogwarts School of Witchcraft and Wizardry. Fleur Delacour is Beauxbatons' champion, Viktor Krum is Durmstrang's champion, and Cedric Diggory is Hogwarts' champion.
The First Task of the Triwizard Tournament is held. The champions take it in turn to try to steal a golden egg from the clutches of a dragon.
The Yule Ball is held from 8 P.M. to midnight and is open to fourth years and above, though younger students may attend if invited by an older student.
Rita Skeeter writes article about Rubeus Hagrid that appears in the Daily Prophet, revealing him to be a half-giant. He is distraught for days.
The Second Task of the Triwizard Tournament is held. The champions have to rescue loved ones from the depths of the Black Lake, where they are being held by merpeople.
The Third Task of the Triwizard Tournament is held. The Champions have to navigate a maze grown on the Hogwarts Quidditch pitch, populated by various obstacles and dangers that they have to overcome. Cedric Diggory is the first Champion to successfully navigate the maze and reach the Cup and is declared the winner.
The 423rd Quidditch World Cup takes place. Malawi wins the Cup after defeating Senegal in the second-ever all-African final. In response to the riots that took place on the night of the 1994 final, security at this World Cup was tighter than ever before, and the Senegalese team mascots, Yumboes, ended up being arrested outside the stadium. The Yumboes responded to the arrest by stealing every bit of food within a ten-mile radius in revenge and vanishing into the night
Neville Longbottom, Harry Potter, Draco Malfoy, and their cohort finish their studies at Hogwarts.
Rufus Fudge, nephew of former Minister for Magic Cornelius Fudge, Vanishes a Muggle "tube train" for a bet. The Muggles do not notice that the train had gone missing, but Fudge is suspended from the Improper Use of Magic Office, after an inquiry is launched two days later.
Brotherhood of Goblins supporters run a riot in Chipping Clodbury during a meeting with representatives from the Department for the Regulation and Control of Magical Creatures, in order to discuss the creation of a Goblin Bill of Rights. The goblins used illegal wands for transfiguration and called for the release of activist Hodrod the Horny-Handed. Goblin-wizard relations are reported by the Daily Prophet to be at an all-time low.