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The 1990s

1992 (Y12) AD = 111  MM = 67  TR = 66  RH = 64  M = 34  BW = 22  CW = 20  PW = 16  FGW = 14  HG = 13  H&R = 12  GW = 11  

Cassiopeia Black dies at age 77 (BFT)
Cygnus Black, father of Bellatrix, Narcissa, and [Andromeda], dies at age 54 (BFT)
Lucretia Black Prewett dies at age 67 (BFT)
circa April
Creatures witches and wizards Norbert hatchesThe calendar lists this date as April 24, but all we really know is that it is a few weeks before exams and that the weather gave the first hint of summer coming.
(PS14)
circa May 9
Creatures Charlie's friends take Norbert from Harry and Hermione on top of the Astronomy TowerUnfortunately, they are caught by Filch - and given detentions by McGonagall.
Derived from the estimated date of Norbert's hatching.
(PS14)
May 26
Creatures Death Eaters witches and wizards Harry, Hermione, Neville, and Malfoy serve their detentions in the Forbidden ForestWith Hagrid supervising, they track down a dead unicorn. Harry encounters Voldemort for the first time, and is saved by Firenze.
We have no indication of when this date might be, except that it is shortly before final exams.
(PS15)
early June
Death Eaters history & timelines witches and wizards Harry, Hermione, and Ron follow Quirrell after the Philosopher's StoneThey overcome the various protections, and defeat Quirrell/Voldemort's attempt to steal the Stone.
The dates of this event are contingent on the dates of exams in Harry's first year. We are given dates for exams in books two and three--the first week of June--but that doesn't seem to be a hard and fast rule. The calendar for this book gives the date as June 4, based on the exam dates in the other books, but here on the timeline we'll play it a bit safer and just go with "early June."
(PS16)
June
Hogwarts School of Witchcraft and Wizardry Quidditch End of Term FeastGryffindor wins the [House Cup], but not the [Quidditch Cup], which goes to Slytherin.
(PS17)
circa June
Quidditch The Nimbus 2001 broomstick is releasedLucius Malfoy soon buys them for the Slytherin Quidditch team. As it happens, Draco is made [Seeker] during the upcoming school term.
(CS7)
after June
herbology Nicholas and Perenelle Flamel die after a long, long life (PS17)
July 31
Creatures Ministry of Magic witches and wizards Harry's 12th BirthdayDobby the house-elf visits Harry in Privet Drive. Meanwhile, the [Dursleys] are holding a dinner party for the [Masons], which is then disrupted when Dobby drops a violet pudding on [Mrs. Mason]'s head. Harry is sent a warning letter from the [Ministry], reminding him that he is not allowed to do magic outside of school (CS1, CS2).
circa August 3
witches and wizards Fred, George, and Ron rescue Harry from the [Dursleys] in their father's Ford AngliaThis is very likely the night of August 3, three days after Harry's birthday. He arrives at the [Burrow], then, on the morning of August 4.
(CS2)
circa August 13
Hogwarts School of Witchcraft and Wizardry Gilderoy Lockhart announces that he is the new Defence Against the Dark Arts professor at HogwartsHarry, who arrives at [Flourish and Blotts] just in time for the announcement, accidentally (and unwillingly) gets caught up in the publicity. Not long afterward, Lucius Malfoy and Arthur Weasley get into a scuffle, and Lucius drops Voldemort's diary into Ginny Weasley's [cauldron].
(CS6)
September 1
witches and wizards Harry and Ron miss the Hogwarts Express and fly Mr. Weasley's bewitched car to HogwartsThey are spotted by several Muggles along the way and land, at school, in the Whomping Willow - subsequently landing them in a fair amount of trouble as well.
(CS5)
September 1
Hogwarts School of Witchcraft and Wizardry witches and wizards Ginny Weasley, Luna Lovegood, and Colin Creevey start their first year at HogwartsGinny and Colin are sorted into Gryffindor and Luna becomes a Ravenclaw. Harry and his friends, meanwhile, start their second year.
(CS5)
circa September 8
Creatures history & timelines Hogwarts School of Witchcraft and Wizardry The Chamber of Secrets is reopenedThis time the Chamber is opened by Ginny Weasley, under the influence of Tom Riddle, by means of his diary. Harry first hears the voice of the Basilisk during his detention with Lockhart.
This is about a week into the school year, so it didn't take Riddle long to force Ginny to open the Chamber.
(CS7)
October 31
Hogwarts School of Witchcraft and Wizardry The Halloween Feast and 500th Deathday for Nearly Headless Nick (CS8)
late October 31
Creatures Hogwarts School of Witchcraft and Wizardry The Basilisk from the Chamber of Secrets attacks its first victim: Filch's cat, Mrs. NorrisHarry is discovered at the scene of the crime, and students start suspecting him to be the heir of Salazar Slytherin. Harry and his friends, meanwhile, begin to suspect Draco Malfoy.
If we go by the calendar of this year according to the official timeline, Halloween is on a Saturday.
(CS8)
November 8
Creatures herbology Hogwarts School of Witchcraft and Wizardry witches and wizards Colin Creevey is Petrified by the BasiliskThe next morning, Ron and Hermione start working on brewing [Polyjuice Potion].
(CS10)
December 17
Creatures witches and wizards The [Duelling] ClubHarry unwittingly uses Parseltongue to talk to a snake in front of the whole school; the Hufflepuffs in particular are now entirely convinced he's the heir of Salazar Slytherin.
(CS11)
December 18
Creatures Hogwarts School of Witchcraft and Wizardry Justin Finch-Fletchley and Nearly Headless Nick are petrified by the BasiliskHarry is taken to Dumbledore's office by McGonagall, but when [Dumbledore] asks if Harry has anything to tell him, Harry says he doesn't.
(CS11)
circa December 20
Gazetteer Merchant Mr and Mrs Weasley visit Bill in Egypt
Egypt
The Weasley children stayed on at Hogwarts over the holidays rather than visit Bill in Egypt with their parents. They would all visit Egypt the following summer.
December 25
herbology witches and wizards Harry and Ron use [Polyjuice Potion] to "become" Crabbe and Goyle.They go into the Slytherin common room and learn that Malfoy is NOT the heir of Salazar Slytherin.
(CS12)
December 25
Creatures herbology witches and wizards Hermione is accidentally changed partially into a catShe spends the next month in the hospital wing.
(CS12)

1993 (Y13) AD = 112  MM = 68  TR = 67  RH = 65  M = 35  BW = 23  CW = 21  PW = 17  FGW = 15  HG = 14  H&R = 13  GW = 12  

Quidditch The Sweetwater, Texas [Quidditch] team, the [All-Stars], defeats the [Quiberon Quafflepunchers]The match lasts five days.
(QA8)
Creatures Ministry of Magic [Dolores Umbridge] crafts anti-werewolf legislationThe new law makes it almost impossible for Lupin to get a job.
(OP14)
February 14
Hogwarts School of Witchcraft and Wizardry witches and wizards Valentine's DayLockhart takes it upon himself to whip up a celebration; Harry receives an anonymous [singing valentine].

That night, Harry learns how to work Riddle's diary and travels into his memory, which convinces Harry that Hagrid had opened the Chamber of Secrets.
(CS13)
May 8
Creatures Hogwarts School of Witchcraft and Wizardry Quidditch witches and wizards The Basilisk petrifies Hermione Granger and Penelope ClearwaterThe Hogwarts [Quidditch Cup] is cancelled.
(CS13)
late May 8
Hogwarts School of Witchcraft and Wizardry Ministry of Magic witches and wizards Hagrid is sent to [Azkaban]; [Dumbledore] is removed as headmaster of HogwartsHarry and Ron watch from under the invisibility cloak as Cornelius Fudge and Lucius Malfoy serve the orders.
(CS14)
May 24
Creatures witches and wizards Harry and Ron enter the Forbidden Forest and meet Aragog (CS15)
May 29
Harry and Ron discover the Chamber of SecretsThey learn that Ginny Weasley has been taken into the Chamber and go to offer their knowledge to Professor Lockhart. When they discover he's trying to take off, they instead force him to join them - and go through Moaning Myrtle's bathroom down into the Chamber of Secrets.
(CS16)
late May 29
Creatures herbology history & timelines witches and wizards The spirit-form of Voldemort is defeated by Harry Potter in the Chamber of SecretsHarry kills the Basilisk and uses its fang to destroy the diary, therefore destroying Riddle and saving Ginny's life. Gilderoy Lockhart's memory is destroyed when he attempts to [Obliviate] Ron and Harry and get out of the Chamber.

Later that night, the [Petrified] people are restored using [Mandrake Draught].
original artwork © [Agata Matteucci], used by permission
(CS17)
May 30
Creatures witches and wizards Dobby the house-elf is freed from service to the [Malfoy family]He is freed when Harry tricks Lucius Malfoy into throwing him a sock.
(CS18)
May 30
Death Eaters Hogwarts School of Witchcraft and Wizardry witches and wizards Lucius Malfoy is removed from the Board of Governors of HogwartsHagrid and [Dumbledore] return to Hogwarts
(CS18)
June
Hogwarts School of Witchcraft and Wizardry Gryffindor wins the [House Cup]; no [Quidditch Cup] is awarded (CS18)
circa July
witches and wizards The Granger family vacations in France (PA1)
July
witches and wizards Arthur Weasley wins 700 [Galleons] in a [Daily Prophet] drawingThe Weasley family spends a month in Egypt, visiting Bill.

They leave a week before Harry's birthday and stay until the week before the end of the holidays. They are gone the last week of July and the first three weeks of August.
(PA1)
July 27
[Jo Rowling]'s first daughter, [Jessica Isabel Rowling], is born
circa July 30
Animagi buildings Ministry of Magic witches and wizards Sirius Black escapes from [Azkaban]He escapes by changing into his dog form and swimming back to the mainland.
Very likely the escape happened within a day or two of Harry's birthday, since it shows up on the morning news on the 31st. Sirius saw the photo of the Weasleys during that previous week, on a copy of the [Daily Prophet] Fudge had finished reading. This particular photo had appeared a week before Harry's birthday, which would be on the 24th. Fudge wouldn't be carrying a paper more than a day old, so Black would have proabably seen the picture on that actual day. Given reasonable time for all this to occur, it works out logically that he worried frantically about what to do to protect Harry for several days, was heard moaning "He's at Hogwarts" in his sleep as he agonized over the situation, then finally escaped on the 29th or 30th.
(PA1)
July 31
Birthdays food and drink Muggle world, the witches and wizards Harry's 13th birthday; [Aunt Marge] comes for a visit with the [Dursleys]"[Aunt Marge] coming for a week-long visit - it was the worst birthday present the [Dursleys] had ever given him, including that pair of [Uncle Vernon]'s old socks."
(PA2)
August
Merchant Quidditch [Quality Quidditch Supplies] displays the new [Firebolt] [broomstick] (PA4)
August 7
Spells food and drink items and devices Muggle world, the On the last day of [Aunt Marge]'s visit, Harry blows her up and runs awayThe [Knight Bus] picks him up in Magnolia Crescent and drops him off at the [Leaky Cauldron].
(PA2)
after August 7
Quidditch Harry stays at the [Leaky Cauldron] and spends his days in [Diagon Alley]He does his homework out in the open, eats free ice creams, picks up his [books], and repeatedly stops by [Quality Quidditch Supplies] to admire the [Firebolt].
(PA4)
August 31
Harry meets Hermione and Ron in [Diagon Alley]They are all staying at the [Leaky Cauldron]. Hermione buys Crookshanks.

That night, Harry overhears Mr. and Mrs. Weasley in conversation - and learns that Sirius Black is after him.
(PA4)
September
Hogwarts School of Witchcraft and Wizardry Quidditch The [Gryffindor Quidditch team] is looking very promising this year[Oliver Wood] says that "Gryffindor hasn't won for seven years now." He is taking into account the fact that no Cup was awarded last year when he says this (so that it agrees with other such comments in the book, quoted below). The last time Gryffindor won the [Quidditch Cup], then was the 1983-1984 season.

This year's team consists of:
  • [Oliver Wood], seventh year, [Keeper], Captain
  • [Angelina Johnson], fifth year, [Chaser]
  • [Alicia Spinnet], fifth year, [Chaser]
  • Fred Weasley, fifth year, [Beater]
  • George Weasley, fifth year, [Beater]
  • Harry Potter, third year, [Seeker]
  • Katie Bell, fourth year, Chaser
During Harry's first year, the following comment is made:
"If they won their next match, against Hufflepuff, they would overtake Slytherin in the house championship for the first time in seven years...As the match drew nearer, however, Harry became more and more nervous, whatever he told Ron and Hermione. The rest of the team wasn't too calm, either. The idea of overtaking Slytherin in the house championship was wonderful, no one had done it for seven years, but would they be allowed to, with such a biased referee?"
(PA8)
September 1
Hogwarts School of Witchcraft and Wizardry witches and wizards Harry and his friends begin their third year at Hogwarts, which is now surrounded by DementorsDementors search the Hogwarts Express while students are on their way to school, making Harry collapse.
(PA5)
October 31
Animagi Hogwarts School of Witchcraft and Wizardry portrait, tapestry, sculpture witches and wizards Sirius Black breaks into Hogwarts and slashes the Fat Lady in an attempt to find PettigrewEveryone thinks he's after Harry; [Dumbledore] sends all of the students to sleep in the Great Hall overnight. Snape thinks Lupin is helping Sirius sneak into the castle.
(PA8)
November
Quidditch Harry loses his first-ever [Quidditch] matchThe [Gryffindor Quidditch team] loses to Hufflepuff when Dementors cause Harry to fall off his broom, and Cedric Diggory grabs the Snitch. Harry's Nimbus 2000 is blown into the Whomping Willow and smashed to bits.
(PA9)
circa December 18
witches and wizards End-of-Term trip to [Hogsmeade]Fred and George give Harry the Marauder's Map, which allows him to sneak into [Hogsmeade]. Once there he overhears a conversation among [Hogwarts staff] - and learns that Sirius Black, his godfather, betrayed his parents to Voldemort.
(PA10)
December 25
Quidditch Christmas - Harry receives a [Firebolt], but McGonagall takes it awayRon and Harry are angry with Hermione for weeks over the fact that she told McGonagall about the [Firebolt].
(PA11)

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