Sword Art Online Timeline

2008

 * Kazuto is adopted by the Kirigaya family after his birth and his parents' death.

2018

 * Kazuto finds out about his parents' deaths.

September/October

 * Asada Shino is involved in a bank robbery.

May

 * The NerveGear is created.

August

 * The Sword Art Online Closed Beta is launched.

September

 * The Sword Art Online Closed Beta is closed.

November 6

 * Start of Sword Art Online Official Server Service.
 * Kirito shows Klein the ropes of the game.
 * 17:30 Aincrad Standard Time - Kayaba Akihiko successfully traps 10,000 Players in the game. Of this 10,000, approximately 700-800 are beta testers.
 * 213 people died because of family or friends of the players attempted to remove the NerveGear from their head.
 * Kirito parts ways with Klein and heads to Horunka Village.
 * Kirito goes off to complete the «Secret Medicine of the Forest» quest. He meets Coper, another beta tester. Coper tries monster PK Kirito only to end up dying himself.

After November 6

 * The guild Aincrad Liberation Force was started.

December

 * Suguha finds out about Kazuto’s parents’ death.
 * 2000 people had died from playing Sword Art Online. Of this number, 300 deaths were beta testers.
 * The top class proto-front-lines group is barely level 10 on average.

December 2

 * Kirito meets Asuna.
 * The First Floor Boss Strategy Meeting is held in the Town of Tolbana.

December 3

 * Diabel's party finds the First Floor Boss Room.
 * The second First Floor Boss Strategy Meeting was held. Asuna temporarily joins Kirito's party.
 * Asuna borrows Kirito's bathroom.

December 4

 * 10:00 Aincrad Standard Time - The First Floor Boss Raid Group bands together.
 * Kirito deals the Last Attack on Illfang the Kobold Lord. He gains the Coat of Midnight as a bonus.
 * The term Beater was created.
 * Kirito opens the teleport gate to the second floor. The first Town Opening is held.
 * Kirito helps Argo out. He starts the acquisition quest for the Martial Arts Extra Skill.

December 7

 * Kirito completes the acquisition quest for the Martial Arts Extra Skill.

December 8

 * Asuna forces Kirito to help her hunt «Needle of Wind Wasp».
 * Kirito is Level 13

December 14

 * The second floor boss is defeated.
 * Asuna and Kirito party together. With Kirito's help, Asuna defeats the Dark Elf.

2023

 * Konno Yuuki begins using the MediCuboid.

April

 * Kirito joins the guild Black Cats of the Full Moon.
 * Lead Group makes it through the 28th Floor, according to the Weekly Argo newspaper.

May

 * Creation of AmusSphere and ALfheim Online.

June

 * Death of the Black Cats of the Full Moon.

October-November

 * Kirito acquires the unique skill "Dual Blades".

November

 * Suguha joins ALO.

December
December 24
 * Kirito defeats the event boss, Nicholas The Renegade.
 * Kirito receives a Timer-Activated Message Record Crystal from Sachi.
 * Front line is at 47th Floor.

January

 * Birth of the red guild "Laughing Coffin" (January 2024, SAO).
 * Kirito acquires the sword Elucidator from a rare drop.

February

 * Volume 2 - "Black Swordsman".
 * Front Line is at 55th Floor.

March

 * ME1 - "The Progressers".
 * Duel between Asuna and Kirito.
 * 56-57th Floor of Aincrad.

April

 * Serious meeting between Asuna and Kirito.
 * Volume 8 - "A Murder Case in the Area".
 * Front Line is at 59th Floor.

June

 * Volume 2 - "Warmth of the Heart".
 * Kirito acquired the sword "Dark Repulser".
 * Front Line is at 63rd Floor.

August

 * Gaiden - "Sound of Water, Sound of Hammer".
 * Front Line is at 70th Floor.
 * Coalition against "Laughing Coffin".
 * 74th Floor of Aincrad.

September

 * ME4 - "Cold Hand, Warm Heart".

October

 * Volume 3 - Beginning of Prologue.
 * Volumes 1, 2 - Prologue.
 * Volume 1 - Chapter 1.
 * Volume 1 - End of Chapter 4.
 * Volume 1 - Chapters 5-12.

9 October

 * Front liners actively begin exploring the 74th Floor.

18 October

 * Kuradeel challenges Kirito to a duel
 * The Gleam Eyes is defeated; 75th Floor of Aincrad is reached.

19 October

 * Kirito meets Heathcliff and they agree to duel.
 * Volume 1 - Chapter 12

20 October

 * Kirito duels with Heathcliff and loses; Kirito joins the "Knights of Blood".
 * Volume 1 - Chapter 13.

22 October

 * Kirito meets with Godfree and Kuradeel to train in the 55th Floor dungeon
 * Kirito proposes marriage to Asuna
 * Volume 1 - Chapters 14-16.

24 October

 * Kirito and Asuna request leave from the Knights of the Blood
 * Presumably, they get married on this day (6 days before encountering Yui)

25 October

 * Kirito and Asuna move into their new home on the 22nd Floor.

26-29 October

 * ME6 - "Algade Showdown".
 * Gaiden - Chapter 16.5.

30 October

 * Kirito and Asuna encounter Yui
 * Volume 2 - "Morning Dew Girl".

31 October

 * Kirito and Asuna travel to Starting City with Yui; they encounter Sasha and the orphanage

November

 * Volume 1 - Chapters 17-19.

November 1

 * Kirito and Asuna are approached by Yulier. They enter the dungeon under Black Iron Castle.
 * Yui is erased by Cardinal, but not before Kirito saves the data.

November 2

 * Kirito and Asuna leave Starting City and return to the 22nd Floor.

November 3

 * Kirito meets Nishida

November 6

 * Kirito and Nishida successfully manage to fish the local fish god.

November 7

 * Volume 1 - Chapters 20-24.
 * 10:00 AM: Kirito and Asuna report at Grandum
 * 1:00 PM: Raid party departs for the 75th Floor Dungeon
 * ~2:20 PM: The Skull Reaper is defeated
 * 2:55 PM: Kirito defeats Heathcliff; Sword Art Online is Cleared
 * SAO Deleted.
 * Volume 1 - Chapter 25.
 * End of Aincrad.
 * Volume 3 - End of Prologue.

January

 * ME5 - "Salvia".
 * Volume 3 - Chapter 1.
 * Volumes 3-4 - Chapters 2-5.
 * "Excaliber" found.
 * Volume 4 - Chapters 6, 7.
 * Volume 4 - Chapter 8.
 * Creation of "Seed".
 * Sugou Nobuyuki Arrested.
 * ALO Suspended.

March

 * Akihiko Kayaba's whereabouts.

April

 * Gun Gale Online Created

May

 * Volume 4 - Chapter 9.
 * End of Fairy Dance.

June

 * Meeting between Shinkawa Kyouji and Asada Shino.
 * Shino joined GGO.
 * Shino acquired "Ultima Ratio Hecate II".

August

 * 1st “Bullet of Bullets”.

October

 * 2nd “Bullet of Bullets”.

November

 * Volume 5 - Prologue.
 * "Death Gun" Murders.

December

 * Volume 5 - Chapters 1, 2.
 * Volume 5 - Chapter 3.
 * Volume 5 - Chapters 4-6.
 * 3rd “Bullet of Bullets”.
 * Volume 5 - Chapter 7.
 * Volume 6 - Chapter 7.2.
 * Volume 6 - Chapters 8-10.
 * Volume 6 - Chapters 11.
 * Volume 6 - Chapter 12.
 * Volume 6 - Chapter 13.
 * Volume 6 - Chapters 14, 15.
 * The Shinkawa Brothers are arrested.
 * Atsushi Kanemoto escapes.
 * Volume 6 - Chapter 16.
 * The Phantom Bullet meet their end.

December 16th

 * Sinon joined ALO.

December 28th

 * Volume 8 - "Caliber".
 * Kirito acquired the sword "Excaliber".
 * Lisbeth acquired the hammer "Mjölnir".

January

 * Volume 7 begins.

April

 * Volume 7 ends.
 * End of Mother's Rosario
 * Accel World Volume 10 - "Versus"

May 18th

 * ME3 - "Ceramic Heart".

June

 * Volume 9 - Alicization Beginning.
 * Volume 10 - Alicization Running.
 * Gaiden - "Cradle of the Moon".

August

 * Gaiden - "There is but one Ultimate way".