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The Sword Art Online Timeline lists the known time and date of all the events that have occurred in the Sword Art Online series in chronological order. 10 years need to be added to the events whose date and time can only be sourced from the web version of SAO to maintain consistency.
- 1 1977
- 2 2006
- 3 2007
- 4 2008
- 5 2009
- 6 2010
- 7 2011
- 8 2016
- 9 2018
- 10 2020
- 11 2021
- 12 2022
- 12.1 May
- 12.2 August
- 12.3 October
- 12.4 November
- 12.5 December
- 12.5.1 December 2nd
- 12.5.2 December 3rd
- 12.5.3 December 4th
- 12.5.4 December 7th
- 12.5.5 December 8th
- 12.5.6 December 9th
- 12.5.7 December 11th
- 12.5.8 December 14th
- 12.5.9 December 15th
- 12.5.10 December 20th
- 12.5.11 December 21st
- 12.5.12 December 24th
- 12.5.13 December 27th
- 12.5.14 December 28th
- 12.5.15 December 29th
- 12.5.16 December 31st
- 13 2023
- 13.1 January
- 13.2 February
- 13.3 March
- 13.4 April
- 13.5 May
- 13.6 June
- 13.7 October
- 13.8 November
- 13.9 December
- 14 2024
- 14.1 January
- 14.2 February
- 14.3 March
- 14.4 April
- 14.5 May
- 14.6 June
- 14.7 August
- 14.8 September
- 14.9 October
- 14.9.1 October 1st
- 14.9.2 October 4th
- 14.9.3 October 9th
- 14.9.4 October 17th
- 14.9.5 October 18th
- 14.9.6 October 19th
- 14.9.7 October 20th
- 14.9.8 October 22nd
- 14.9.9 October 23rd
- 14.9.10 October 24th
- 14.9.11 October 25th
- 14.9.12 October 26th
- 14.9.13 October 27th
- 14.9.14 October 27th - 30th
- 14.9.15 October 30th
- 14.9.16 October 31st
- 14.10 November
- 15 2025
- 15.1 January
- 15.2 February
- 15.3 March
- 15.4 April
- 15.5 May
- 15.6 End of May
- 15.7 June
- 15.8 July
- 15.9 August
- 15.10 September
- 15.11 October
- 15.12 November
- 15.13 December
- 16 2026
- 16.1 January
- 16.2 February
- 16.3 March
- 16.4 April
- 16.5 May
- 16.6 June
- 16.7 July
- 16.8 August
- 16.9 End of Year
- 17 Underworld Timeline
- 17.1 70 Before HEC
- 17.2 52 Before HEC
- 17.3 17 HEC
- 17.4 30 HEC
- 17.5 30-97 HEC
- 17.6 97 HEC
- 17.7 97-117 HEC
- 17.8 117 HEC
- 17.9 167 HEC
- 17.10 167-361 HEC
- 17.11 361 HEC
- 17.12 7th Month of the HEC, 372
- 17.13 3rd Month of the HEC, 378
- 17.14 3rd to 8th Month of the HEC, 378
- 17.15 8th Month of the HEC, 378
- 17.16 3rd Month of the HEC, 379
- 17.17 4th Month of the HEC, 379
- 17.18 3rd Month of the HEC, 380
- 17.19 4th Month of the HEC, 380
- 17.20 5th Month of the HEC, 380
- 17.21 10th Month of the HEC, 380
- 17.22 11th Month of the HEC, 380
- 17.23 2nd Month of the HEC, 382
- 18 Notes
- 19 References
After October 7th
- Kazuto is adopted by the Kirigaya family after his birth and his parents' apparent death.
- Konno Yuuki and Konno Aiko are born and their family is infected with HIV, due to a batch of bad blood.
End of the year
- Shino's family encountered a traffic accident, due to which her father passed away.
- Kirigaya Kazuto gives up on Kendo.
- Kazuto planted Salvia on a countryside land.
- Kazuto finds out about his parents' deaths from the deleted entry record he found on the Internet.
- The NerveGear is announced.
- Japanese Self-Defense Force (JSDF) and U.S. Army start developing training software utilizing the NerveGear together.
- The Sword Art Online Closed Beta is closed.
- People start queuing up at stores for the release of Sword Art Online.
- Sword Art Online sales in stores begin.
- 13:00 JST: Start of the Sword Art Online Official Service.
- Kirito shows Klein the basics of the game.
- After 17:30 - 18:00 Aincrad Standard Time - Kayaba Akihiko successfully traps nearly 10,000 Players in the game. Of this 10,000, between 700-800 are beta testers. 213 people died because their family or friends attempted to remove the NerveGear from their head.
- Kirito parts ways with Klein and heads to Horunka village.
- 18:15 Aincrad Standard Time: Beginning of "The First Day"
- 19:00 Aincrad Standard Time: Kirito goes off to complete the «Secret Medicine of the Forest» quest.
- Kirito meets Coper, another beta tester and both agree to help each other complete the «Secret Medicine of the Forest» quest.
- ~20:30 Aincrad Standard Time: First in-game death in Sword Art Online occurred. The player, Arvin, attempted to test the theory that he would regain consciousness after being disconnected from the server by jumping off from Aincrad.
- ~20:30-21:00 Aincrad Standard Time: Coper tries a monster PK on Kirito only to end up dying himself.[† 2]
- 21:00 Kirito returns to Horunka village, finishes the quest and obtains an Anneal Blade.
- End of "The First Day"
- SAO Case Victims Rescue Force established. Kikuoka Seijirou joined and led it.
- Suguha finds out about Kazuto's parents' death and their actual relationship.
- About 2,000 people had died while playing Sword Art Online. Of this number, roughly 300 deaths were beta testers.
- Liten encountered the iron ore glitch
- Beginning of Progressive Volume 1, Aria of a Starless Night
- Kirito meets Asuna.
- 04:00 Aincrad Standard Time: Asuna loses consciousness in the 1st Floor Labyrinth due to fatigue.
- 16:00 Aincrad Standard Time: The First Floor Boss Strategy Meeting is held in Tolbana.
- Afternoon: Diavel's party finds the boss room.
- Before 17:30 - Aincrad Standard Time - The second First Floor Boss Strategy Meeting was held. Asuna temporarily joins Kirito's party.
- Asuna borrows Kirito's bathroom.
- Night - Asuna obtained Wind Fleuret from a monster drop.
- 10:00 Aincrad Standard Time: The First Floor Boss Raid Group bands together.
- 12:40 Aincrad Standard Time: First Floor Boss fight begins.
- Kirito deals the Last Attack on Illfang the Kobold Lord. He gains the Coat of Midnight as a bonus.
- The term «Beater» was created.
- End of Progressive Volume 1, Aria of a Starless Night.
- Beginning of Progressive Volume 1 Intermission - Reason for the Whiskers. .
- Kirito opens the teleport gate to the second floor. The first Town Opening is held.[† 3]
- Kirito helps Argo out. He starts the acquisition quest for the Martial Arts Extra Skill.
- Kirito completes the acquisition quest for the Martial Arts Extra Skill.
- End of Progressive Volume 1 Intermission - Reason for the Whiskers..
- Beginning of Progressive Volume 1, Rondo of a Fragile Blade.
- 15:00 Aincrad Standard Time: A certain player consecutively failed to strengthen his Anneal Blade four times at Nezha's Smith Shop.
- Asuna persuades Kirito to help her hunt «Needle of Wind Wasp».
- 19:00-19:30 Aincrad Standard Time: Kirito and Asuna go to eat a Tremble Shortcake together, with the expenses paid by Kirito due to him losing their challenge to kill 50 Windwasps first.
- After 19:30 Aincrad Standard Time: Asuna's Wind Fleuret appeared to have vanished, seemingly because of a failure in strengthening.
- 20:28-20:30 Aincrad Standard Time: Asuna's Wind Fleuret +4 returned to her.
- Morning - The only Field Boss on the 2nd Floor, The Bullbous Bow defeated
- Evening - Kirito and Asuna meet Argo in a pub.
- Near 20:00 - Kirito resolved the method used by Nezha to do the Enhancement scam, and he let Nezha abandon his one-handed weapon production skill to acquire the Martial Art skill.
- The 2nd Floor Mid-Bosses, Baran the General Taurus and Nato the Colonel Taurus, is defeated.
- The 2nd Floor Boss, Asterius the Taurus King, is defeated.
- End of Progressive Volume 1, Rondo of a Fragile Blade
- Beginning of Progressive Volume 2, Concerto of Black and White.
- Asuna and Kirito party together. With Kirito and Asuna's help, the Dark Elf Kizmel defeats the Forest Elf.
- Dawn - Asuna melts her Wind Fleuret +5 into an Argentium Ingot, then uses it to make her new rapier, the Chivalric Rapier.
- 17:00 - The first clearing meeting for the 3rd Floor takes place.
- 17:00 - The last clearing meeting for the 3rd Floor takes place.
- 13:12 - The 3rd Floor Boss, Nerius the Evil Treant, is defeated.
- End of Progressive Volume 2, Concerto of Black and White
- Beginning of Progressive Volume 3, Barcarolle of Froth.
- 13:32 - Kirito and Asuna reach the 4th Floor.
- Kirito and Asuna swim to the main city of the 4th Floor with swim rings.
- 14:02 - Kirito and Asuna reach the 4th Floor's main city 
- 14:12 - The town opening for the 4th Floor.
- 14:32 - The 4th Floor Boss, Wythege The Hippocampus, is defeated.
- End of Progressive Volume 3, Barcarolle of Froth.
- Beginning of Progressive Volume 4, Scherzo of Deep Night.
- Night - Joe learned the existence of the Flag of Valor. ALS held a secret strategy meeting and decided to clear the boss themselves before the DKB.
- 22:00 - Morte and Joe have a secret meeting in the underground dungeon beneath Karluin. The meeting is overheard by Asuna.
- 16:15 - Kirito's team entered the 5th Floor Labyrinth tower.
- After 19:00 - Kirito's team reached 5th Floor boss.
- 20:30 - 5th Floor boss defeated.
- Argus disbanded, RECT Progress Inc. takes over SAO server management.
- 22nd Floor Boss was defeated within 3 days of the 21st Floor being cleared.
- Kirito encountered a man in a black poncho, who used the catchphrase "It's showtime", in a castle in Karluin.
- End of Progressive Volume 4, Scherzo of Deep Night.
- Beginning of Progressive Volume 5, Canon of the Golden Rule (I)
- SAOP 4.1 takes place.
- ~03:00 - Asuna and Kirito arrived to Stachion on the 6th Floor.
- Asuna and Kirito met with the leaders of the Dragons Knight Brigade to discuss the handling of the Flag of Valor
- Asuna and Kirito began the Curse of Stachion quest
- 17:30 - Asuna and Kirito completed the information gathering in Stachion portion of the Curse of Stachion questline
- Asuna and Kirito met with Argo in Suribus.
- Asuna and Kirito acquired a golden key at Pithagrus's second home in Suribus and were captured by Cylon as they attempted to leave the house.
- As Cylon transported Asuna and Kirito back to Stachion, their carriage was ambushed by Morte and Joe. Cylon killed by Morte.
- Morte and Joe forced to retreat after the former was nearly killed by Kirito.
- The first Field Boss of the 6th Floor defeated.
- Asuna and Kirito arrived at Castle Galey and reunited with Kizmel.
- 'End of Progressive Volume 5, Canon of the Golden Rule (I)
- The 25th Floor's boss is defeated.
- Over half of the Aincrad Liberation Squad members are annihilated. The ALS leaves the front lines.
- The Knights of the Blood are formed.[† 4]
- Asuna joins the Knights of the Blood.[† 4]
- The Knights of the Blood debut in the 26th Floor's boss clearing meeting.[† 4]
- Volume 2 - "The Red-Nosed Reindeer" begins. >
- Kirito joins the Moonlit Black Cats.
- The Clearers make it through the 28th Floor.
- Front line at the 30th Floor[† 5]
- ~5:45PM: Death of the "Moonlit Black Cats" members, aside from Kirito[† 5].
- The 38th Floor's boss is defeated.
- Nautilus is demoted to the Second Army of the Knights of the Blood and informed that he would not be participating in the boss battle.
- 40th Floor boss room discovered.
- 40th Floor boss strategy meeting is held.
- 09:00 Aincrad Standard Time: The Clearers use a Corridor Crystal to reach the 40th Floor boss room.
- Yuna dies in a dungeon on the 40th Floor.
- Nautilus leaves the Knights of the Blood.
- The 40th Floor's boss is defeated.
- End of Hopeful Chant
- ALfheim Online (ALO) created.
- Kirito learns rumors of a rare item drop which can revive dead players from Argo. Kirito starts power leveling even more so than before in order to solo the event.
- The front line is at the 49th Floor.
- ~00:00 - 03:00 Aincrad Standard Time: Kirito defeats the event boss, Nicholas The Renegade and receives the rumored revival item, the Divine Stone of Returning Soul, only to be disappointed by its description.[† 2][† 6]
- 07:00 Aincrad Standard Time: Kirito receives a Timer-Activated Message Record Crystal from Sachi.[† 2][† 6]
- End of "Red-Nosed Reindeer"
- The 50th Floor's boss is defeated.
- Kirito acquires the Elucidator from a rare drop.
- Suguha joins ALfheim Online.
- Kirito acquires the «Dual Blades» unique skill.
- The Silver Flags guild is attacked by the members of the Titan's Hand. 4 members of the guild are killed by the orange guild and only the leader managed to survive.
- Front Line is at 55th Floor.
- Beginning of "The Black Swordsman".
- Silica gets lost in the Forest of Wandering after splitting from her party. Her partner Pina dies in battle, but she is saved by Kirito who found her by chance.
- Silica and Kirito come to the 47th Floor and acquire the Pneuma Flower.
- The Titan's Hand guild's members are arrested and sent to the prison in the Black Iron Palace.
- Pina is revived.
- End of "The Black Swordsman".
- Beginning of ME1 - "The Progressers".
- 56th Field Boss Strategy Meeting
- Duel between Asuna and Kirito.
- Front Line is at the 59th Floor.
- Volume 8 - "A Murder Case in the Area" begins.[† 7]
- Asuna falls asleep in Danac and Kirito ends up guarding her for most of the day.[† 7]
- 18:27: Caynz fakes his death.[† 7]
- Kirito arrives at Lisbeth's shop and requests a custom sword to be made.
- Kirito and Lisbeth fall down into the X'rphan the White Wyrm's lair.
- Kirito and Lisbeth acquire the Crystallite Ingot that they were looking for and escape the dragon's lair.
- Kirito acquires the "Dark Repulser".
- End of Warmth of the Heart
- "Sound of Water, Sound of Hammer" takes place.
- Front Line is at 70th Floor.
- The location of the Laughing Coffin base is leaked. The clearers form a subjugation party and assault the guild's headquarters. Laughing Coffin is annihilated.
- ME4 - "Cold Hand, Warm Heart".
- Volume 3 - Beginning of Prologue.
- Volume 1, 2 - Prologue.
- Volume 1 - Chapter 1.
- Volume 1 - End of Chapter 4.
- Volume 1 - Chapters 5-12.
- The Story Pencil Board story takes place.
- Asuna and Lisbeth take a bath together in an open-air bath located outside the AREA, with Kirito guarding the two from monsters.
- The boss of the 73rd Floor was defeated a couple days prior to the events of The Fourteenth Autumn.
- Beginning of "The Fourteenth Autumn"
- Silica and Kirito celebrate Silica's birthday on the 35th Floor. Kirito gives Silica the Ring of Angel's Whisper as a gift, but she never gets the chance to actually use it.
- End of "The Fourteenth Autumn"
- Front liners actively begin exploring the 74th Floor.
- Kirito obtained Ragout Rabbit
- Kirito visits Asuna's home on the 61st Floor for the first time and Asuna cooks the Ragout Rabbit's Meat he had acquired.
- ~9:10 Aincrad Standard Time: Kuradeel challenges Kirito to a duel.
- 15:00 Kirito and Asuna take a break to eat lunch in the Labyrinth.
- Kirito uses his Dual Blades in public for the first time.
- The Gleam Eyes is defeated; 75th Floor of Aincrad is reached.
- Volume 1- Chapter 12.
- Kirito duels with Heathcliff and loses. Kirito joins the "Knights of the Blood ".
- Volume 1 - Chapter 13.
- Kirito wears Knights of the Blood's white uniform for the first time.
- Kirito tells Asuna about his past guild, "Moonlit Black Cats", and his reason why he refuses to form a party or joining a guild with anyone since then.
- Argo ended up being trapped in a flying log house after accepting the «Witch of the West and the Three Treasures» quest without bringing Toto with her.
- Volume 1 - Chapters 14-16.
- Kirito meets with Godfree and Kuradeel to train in the 55th Floor Labyrinth.
- Kuradeel kills Godfree during training, and reveals that he is actually a member of "Laughing Coffin". Asuna arrives to save Kirito, but as she is about to deal the finishing blow, she had a moment of hesitation which Kuradeel used to disarm her. Kirito then rushes in and kills Kuradeel.
- Kirito and Asuna request leave from the Knights of the Blood.[† 9]
- 21:00 Kirito proposes marriage to Asuna in her house in Selmburg.
- Chapter 16.5 takes place. (non-canon)
- "The Day Before" takes place: Kirito, Asuna and Argo took the Witch of the West and the Three Treasures side quest. 
- Sword Art Online Material Edition 10 (16.6) takes place.
- 17:19 Kirito and Asuna get married.
- Sword Art Online Material Edition 11 (16.7) takes place.
- Sword Art Online Material Edition 12 (16.8) takes place.
- Kirito and Asuna move into their new home on the 22nd Floor.
- Sword Art Online Material Edition 13 (16.9) takes place.
- 17:19 - Beginning of Sword Art Online Material Edition 14 (Sugary Days 5)
- End of Sword Art Online Material Edition 14 (Sugary Days 5)[† 10]
- Sword Art Online Material Edition 15 (Sugary Days 6) takes place
- Sword Art Online Material Edition 16 (Sugary Days 7) takes place
- Night - Beginning of Sword Art Online Material Edition 18 (Sugary Days 8)
- The last Field Boss of the 75th Floor is defeated.
- 10:00 - End of Sword Art Online Material Edition 18 (Sugary Days 8)
- Sword Art Online Material Edition 19 (Sugary Days 9) takes place
October 27th - 30th
- ME6 - "Algade Showdown".
- Beginning of "Morning Dew Girl".
- Kirito and Asuna encounter Yui in a forest on the 22nd Floor.
- Kirito and Asuna travel to the Starting City with Yui; they encounter Sasha and the orphanage.
- Volume 1 - Chapters 17-19.
- Kirito and Asuna are approached by Yulier. They enter the dungeon under Black Iron Palace.
- Yui used the «Object Eraser» GM feature to delete the The Fatal Scythe.
- Yui is erased by Cardinal, but Kirito manages to extract her core file and saved it to his NerveGear's local memory.
- Kirito and Asuna leave the Starting City and return to the 22nd Floor.
November 3rd-November 5th
- Kirito and Nishida successfully manage to fish the The King of Lakes.
- Scout party of 20 people departs for the 75th Floor boss room. Half of the party is wiped out.
- Volume 1 - Chapters 20-24.
- 10:00 Aincrad Standard Time: Kirito and Asuna report at Granzam[† 11][† 12]
- 13:00 Aincrad Standard time: Raid party departs for the 75th Floor boss room using a Corridor Crystal.
- After 14:00 Aincrad Standard Time: The Skull Reaper is defeated. The group suffered fourteen casualties during the battle.[† 13]
- Kirito reveals Heathcliff's identity to be Kayaba Akihiko.
- Heathcliff duels Kirito as the final boss of SAO.
- Asuna dies in the game.
- Beginning of "The Final Promise". 
- 14:55 Aincrad Standard Time: Kirito defeats Heathcliff; Sword Art Online is Cleared.
- ~15:00 Aincrad Standard Time: Around 6,000 remaining players are automatically disconnected, 300 of them (including Asuna) got transported to ALfheim Online instead of returning to the real world.
- Keiko wakes up in her hospital room.
- Ending of "The Final Promise".
- Kirito wakes up in his hospital room.
- SAO Deleted.
- Kayaba Akihiko commits suicide by scanning his brain with a modified FullDive machine (a Soul Translator (STL) prototype) and is successful in transferring his scanned conscience onto the Internet.
- Volume 1 - Chapter 25.
- End of Aincrad Arc.
- Volume 3 - End of Prologue.
- Creation of «The Seed»
- Beginning of Volume 3 - Chapter 1.
- Kazuto visits Asuna at the hospital and meets Sugou Nobuyuki. During their conversation, he finds out about Nobuyuki's plan to get married to Asuna.
- Kazuto finds out about ALfheim Online from Andrew and finds out about the picture of Asuna taken at the World Tree.
- End of Volume 3 - Chapter 1.
- Beginning of Volume 3 - Chapter 2.
- Noon - Kirito enters ALO, meets Leafa and helps her defeat several Salamanders. At Swilvane, they decide to meet up the next day for a journey to the World Tree.
- End of Volume 3 - Chapter 2.
- Volume 3 - Chapter 3-4.
- Kirito and Leafa departed from Swilvane, and were attacked near the city of Legrue by twelve Salamanders.
- Kirito stopped the Salamanders from attacking the Sylph and Cait Sith meeting.
- ~02:00 JST: Kirito and Leafa accidentally entered Jötunheimr and encountered a beast-type Evil God, Tonky.[† 6][† 14]
- ~03:00 - 04:00 JST: "Holy Sword Excalibur" found.[† 6][† 14]
- ~04:00 JST: Kirito and Leafa arrive at Alne[† 6][† 14]
- After 15:00 JST: Kirito received an admin card from Asuna and then challenged the Grand Quest on his own for the first time.[† 14][† 6]
- Kirito and Leafa recognize each other's real life identity.
- "Battle" between Kirito and Leafa
- Kirito reached top of the World Tree with the help of Leafa, Recon, Cait Sith and Sylph. At the top of the tree he met Asuna and fought against Oberon.
- Kirito obtained The Seed from Kayaba Akihiko.
- Sugou Nobuyuki attacked Kirigaya Kazuto in the car park outside Asuna's hospital,
- The Seed package became available to the public for free.
- Kayaba Akihiko's hiding location is discovered.
- Kazuto met Koujiro Rinko after asking her for a meeting to find out more about Akihiko.
- SAO Survivor School's first school year begins.
- ALO Re-established under new moderators. The data of all old ALO and SAO players is transferred to New ALO.
- Gun Gale Online (GGO) Created.
- Main events and ending of The Celeste Fairy 
- 00:00 JST Establishment of New Aincrad inside of the New ALO.
- The first 10 Floors of New Aincrad are opened up for conquering (the Floor Bosses still need to be defeated to gain access to the Floors though).
- End of Fairy Dance Arc.
End of May
- Beginning of "The Day After".
- ~16:00 JST: The boss battle of the 8th Floor of New Aincrad begins.
- ~17:00 JST: The boss raiding party is wiped out.
- The clearers attempt another raid on Wadjet the Flaming Serpent. Before the battle, Kirito changes his hairstyle from his previously spiky hair to his SAO day style.
- End of The Day After
- 1st «Bullet of Bullets».
- Kohiruimaki Karen begins playing Gun Gale Online as LLENN.
- 11th to 20th Floors of New Aincrad are opened up for conquering.
- 2nd «Bullet of Bullets».
- LLENN begins to hunt monsters and, later, players.
- Beginning of Volume 5 - Prologue.
- 23:30:02 - 23:30:15 JST: «Death Gun» murders Shigemura Tamotsu (XeXeeD).[† 6][† 2]
- End of Volume 5 - Prologue.
- Shigemura Tamotsu's body is found.
- Usujio Tarako's body is found.
- LLENN meets Pitohui
- Volume 5 - Chapters 1, 2.
- ~11:00 JST - Kazuto meets up with Kikuoka Seijirou, who asks him to investigate a case in Gun Gale Online.[† 6]
- ~15:00 JST - Kazuto meets Asuna outside the Imperial Palace.
- Volume 5 - Chapter 3.
- Volume 5 - Chapters 4-5.
- Volume 6 - Chapter 7.2.
- Volume 6 - Chapters 8-9.
- 20:00 JST: Beginning of the 3rd Bullet of Bullets
- Volume 6 - Chapter 10.
- 20:40-20:44 JST: «Death Gun» murders Pale Rider.
- Volume 6 - Chapter 11.
- Volume 6 - Chapter 12.
- Volume 6 - Chapter 13.
- Volume 6 - Chapter 14.
- 22:04:37 JST: End of the 3rd Bullet of Bullets.
- The Shinkawa Brothers are arrested.
- Volume 6 - Chapter 16.
- 16:00 JST: - Kazuto and Shino meet Kikuoka.
- Shino meets Asuna, Rika, and a victim in the post office's case.
- End of Phantom Bullet Arc.
- Sinon joined ALO.
- Information regarding the release of the 21st to 30th floors of New Aincrad into ALO is announced.
- 19:00 JST: 21st Floor of New Aincrad unlocked.
- The boss of the 21st Floor of New Aincrad is defeated by the 7 member party of Asuna, Kirito, Klein, Agil, Lisbeth, Silica and Leafa and other parties.
- 22nd Floor of New Aincrad unlocked.
- Kirito and Asuna leave their previously rented home in Yggdrasil City and reacquire their old wooden house that they had bought on the original Aincrad on the 22nd Floor.
- Volume 8 - "Calibur".
- Klein saves Freyja (Thor).
- Kirito acquires the "Holy Sword Excalibur".
- Klein acquires the "Lightning Hammer Mjölnir" and gave it to Lisbeth.
- Silica Side Story: "A Spot of Sunshine in the Winter".
- 23rd, 24th, 25th, 26th and 27th Floors of New Aincrad are unlocked prior to the events of Mother's Rosario.
- Asuna duels with «Absolute Sword» Yuuki.
- Asuna meets the members of the «Sleeping Knights»
- The boss of the 27th Floor of new Aincrad is defeated.
- Asuna meets Yuuki at the Yokohama North General Hospital.
- Yuuki spends the first day at the SAO survivor school with Asuna.
- Yuuki and Asuna visit Yuuki's old house.
- Asuna shows her mother the forest around her house in New Aincrad and, the next day, she gets permission to continue her studies in the SAO survivor school, under the condition that she keeps her grades up.
- Asuna holds a barbecue at her house in the forest, with 30 players participating. The 30 players, having built up enthusiasm over the party, rush up to the 28th Floor's boss room and defeat the boss.
- Beginning of Gun Gale Online Volume 1 - Prologue and SECT.3
- Pitohui tells LLENN about the Squad Jam tournament.
- End of Gun Gale Online Volume 1 - Prologue
- LLENN joins the first Squad Jam tournament.
- Deadline for applications for the first Squad Jam.
- LLENN meets with Pitohui in GGO. LLENN meets M for the first time.
- End of Gun Gale Online Volume 1 - SECT.3
- Asuna and the Sleeping Knights defeat the 29th Floor Boss of New Aincrad.
- United dueling tournament in ALfheim Online. Yuuki wins first place, while Kirito comes second.
- The first Squad Jam takes place
- Beginning of Gun Gale Online Volume 2 - SECT.1
- The members of SHINC visit Karen's home to rewatch highlights of the Squad Jam tournament.
- End of Gun Gale Online Volume 2 - SECT.1
- Beginning of Gun Gale Online Volume 2 - SECT.2
- Karen visits her family in Hokkaido.
- Karen meets with Miyu for karaoke.
- Asuna, Rika, Keiko and Suguha go on a three day and two night trip to the Yuuki family home in Kyoto, with Yuuki and her guild members using the Bidirectional Communication Probe to enjoy the sights as well.
- The second Squad Jam is announced.
- Karen returns to Tokyo.
- LLENN purchases a second P90 to replace the original one that she lost during the first Squad Jam.[† 15]
- Karen is approached by Asougi Goushi (M)
- End of Gun Gale Online Volume 2 - SECT.2
- Beginning of Gun Gale Online Volume 2 - SECT.3
- Karen is convinced to participate in the second Squad Jam after being informed about Pitohui's plans to participate in the tournament with her life on the line.
- End of Gun Gale Online Volume 2 - SECT.3
- Beginning of Gun Gale Online Volume 2 - SECT.4
- Karen requests Shinohara Miyu to participate in the second Squad Jam with her.
- The deadline for registrations to the second Squad Jam.
First Saturday of April[† 16]
- The second Squad Jam takes place.
- YUNA's live concert at the New National Stadium takes place.
- Shigemura Tetsuhiro attempts to conduct a high-output scan of the SAO survivors' brains at the New National Stadium.
- An Incarnation of the Radius is defeated.
- Kikuoka Seijirou's team apprehends Shigemura Tetsuhiro.
- Publication of "Full Records of the SAO Incident".
- Nochizawa Eiji surrenders himself to the police at Yoyogi.
- Eiji is released from the police due to Fuurinkazan members deciding not to file a report against him.
- Kazuto meets with Eiji and brings him to a family restaurant to enquire about the fate of the SAO server.
- Eiji, Kazuto, and Yui infiltrate Argus's headquarters to access the SAO server.
- YUNA is saved from the brink of collapse by White Yuna with Eiji's help.
- End of Cordial Chords
- Material Edition 3 (Ceramic Heart) takes place.
- Volume 15 - Chapter 14 takes place.
- Sinon obtained second place in 4th BoB.
- Beginning of Alicization Arc.
- Volume 9 - Alicization Beginning.
- Kirito's dive into Underworld for 3 days as part of his part-time job.
- 361-372 HEC
- Kazuto is attacked by "Johnny Black".
- ~13:45 JST: Kazuto transported away from Setagaya General Hospital.
- Volume 10 - Alicization Running.
- Asuna contacts Rinko about Kazuto having disappeared, and Kikuoka's possible involvement.
- Volume 12 - Alicization Rising.
- Volume 13 - Alicization Dividing.
- 07:15 JST: The destroyer JS Nagato (DD-127) sails away from the Ocean Turtle.
- Volume 14 - Alicization Uniting.
- 14:07 JST: Invasion of the Ocean Turtle begins.
- Kirito's Fluctlight damaged due to sudden power cut.
- Chapter 15-17 of Volume 15 - Alicization Invading.
- Chapter 18 Volume 16 - Alicization Exploding.
- Chapter 19, parts 6-7 Volume 16 - Alicization Exploding.
- 0:00 JST - Underworld FLA decreased to 1.00 times. Underworld and Real World days now occur at the same pace. Equal to Underworld time HEC 380, eighth day of the 11th month, 0:00.
- 3:00 JST: Yui wakes Asada Shino and Kirigaya Suguha to have them contact RATH.
- ~4:20 JST: Yui contacts Klein, Agil, Lisbeth, and Silica to request ALO players for help in the Underworld.
- Volume 17 - Alicization Awakening.
- 5:00 JST: Klein, Agil, Lisbeth, and Silica give their plea to ALO players.
- Chapters 21-23 Volume 18 - Alicization Lasting.
- 10:00 JST: Alice's Light Cube is removed from the Underworld. Current Underworld FLA is set to ~5,000,000 times.
- Volume 18 Epilogue
- Volume 18 Prologue III
- End of Alicization Arc.
End of Year
- 5th "Bullet of Bullets".
Due to the Fluctlight acceleration function of the Soul Translator, the time in Underworld passes at a much different rate than in real life (the FLA rate can be set anywhere from 1,000 to 5,000 times the rate of the real world). Therefore, a different calendar, called the Human Empire Calendar (HEC), is used for events in Underworld. This calendar only starts counting the time about 30 years after Quinella created the Axiom Church though, so some events do take place before the HEC.
70 Before HEC
- Underworld is created.
- 4 Rath employees log in and start raising 2 families of 8 Artificial Fluctlights each.
52 Before HEC
- The Artificial Fluctlights reach the age of 18 and start families of their own.
- The 4 Rath employees log out one at a time under the guise of an "epidemic".
- Quinella is born.
- The Axiom Church is established.
- Quinella discovers the existence of a system command list in Underworld.
- Quinella increases her System Control Authority to the maximum and becomes the Administrator of the Human Empire.
- Quinella stops the natural degeneration of her maximum Life and greatly increases the value of her maximum Life.
- Quinella accidentally fuses the Cardinal System with her Fluctlight.
- Quinella experiments with a command that directly manipulates the Fluctlight of a person on captured Underworld residents.
- Quinella uses the Fluctlight altering command on herself and gets rid of her emotions.
- Quinella discovers the Fluctlight memory limit and that she is about to reach it.
- Quinella invites a nun to the top of the Central Cathedral and attempts to take control of her Fluctlight, to create a backup of her memories.
- Cardinal gains control of the nun's body and retreats to the Great Library Room.
- Quinella turns her research subjects into unconditionally loyal Integrity Knights.
- Cardinal sends out observers to look for collaborators to aid her in fighting against Quinella.
7th Month of the HEC, 372
18th Day of the 7th Month
21st Day of the 7th Month
- Kirito, Eugeo and Alice venture to the cave at the Mountain Range at the Edge.
- Alice touches the soil of the Dark Territory.
22nd Day of the 7th Month
- Deusolbert Synthesis Seven comes to Rulid Village and takes Alice away to the Central Cathedral.
- End of Prologue I
3rd Month of the HEC, 378
19th Day of the 3rd Month
- Beginning of Chapter 1
- Kirito wakes up in Underworld after being injected with succinylcholine by Kanemoto Atsushi (Johnny Black).
- Kirito meets Eugeo for the first time after awakening in Underworld.
21st Day of the 3rd Month
- Selka ventures into the cave at the Mountain Range at the Edge and is captured by goblins.
- Kirito and Eugeo catch up to Selka and fight the goblins. Eugeo is severely wounded but is healed with a «Life» transfer command.
- Alice somehow makes an appearance as a spirit and tells Kirito that she is waiting for him and Eugeo at the Central Cathedral.
After the 21st Day
- The Gigas Cedar is chopped down. Eugeo chooses his next Sacred Task to be a Swordsman.
- Kirito chops off a single branch of the Gigas Cedar.
- Kirito and Eugeo leave for Zakkaria.
- End of Chapter 1
3rd to 8th Month of the HEC, 378
- Kirito and Eugeo reach Zakkaria and start working for a family of farmers.
8th Month of the HEC, 378
28th Day of the 8th Month
- Beginning of Chapter 3
- The Zakkaria Sword Arts Tournament takes place.
- Kirito and Eugeo win the Tournament and become guards of Zakkaria.
- End of Chapter 3
3rd Month of the HEC, 379
7th Day of the 3rd Month
4th Month of the HEC, 379
- Kirito and Eugeo successfully pass the Entrance Exams to the North Centoria Imperial Sword Mastery Academy as the 7th and 8th top ranked among all the new students, which means that they are given the privilege of becoming valets.
3rd Month of the HEC, 380
6th Day of the 3rd Month
- Beginning of Chapter 4
- Kirito promises to show his Aincrad-style skills to his mentor, Sortiliena, as a graduation gift to her.
7th Day of the 3rd Month
- Kirito and Eugeo visit Sadore and claim the sword that he crafted over a year's time.
- Kirito stains Volo's uniform while practicing his Sword Skills and is then ordered to spar with Volo as punishment for this insult.
- Kirito spars with Volo. Although Kirito manages hold out against Volo and is even on the verge of winning, the match was halted by Azurica and claimed as a draw.
- A celebration of the match is held in Sortiliena's room.
8th Day of the 3rd Month
- Sortiliena defeats Volo during the final graduations selection battle and graduates as the top ranked student of the North Centoria Imperial Sword Mastery Academy that year.
Last third of the 3rd Month
- Sortiliena Serlut and Volo Levantein are defeated in the Empire Swordsmanship tournament by Eldrie Woolsburg. Eldrie becomes a representative of the Norlangarth North Empire in the Four Empires Unity Tournament.
- End of Chapter 4
- Kirito and Eugeo are placed in 5th and 6th place during the promotion examination at the end of the year and become elite swordsmen-in-training.
4th Month of the HEC, 380
- New school year at the Sword Mastery Academy begins.
- Kirito and Eugeo are assigned valets of their own, Ronye and Tiese.
5th Month of the HEC, 380
17th Day of the 5th Month
- Interlude III takes place.
- Beginning of Chapter 5
- Eugeo spars with Humbert. The match is declared a draw.
20th Day of the 5th Month
- Eugeo and Kirito go on a picnic with their valets, Tiese and Ronye.
- Eugeo and Kirito confront Humbert for mistreating his valet, Frenica.
22nd Day of the 5th Month
- Tiese and Ronye confront Humbert and Raios and "insult" them.
- Humbert and Raios attempt to "punish" the girls.
- Eugeo breaks the «Seal of his right eye» and attacks Humbert, cutting off his arm.
- Kirito attacks Raios to protect Eugeo. Both Raios' hands are cut off with «Whirl Current».
- Raios dies due to his Fluctlight breaking down.
23rd Day of the 5th Month
- ~09:00 Eugeo and Kirito are arrested by Alice Synthesis Thirty.
- End of Chapter 5
- ~12:00 : Kirito and Eugeo are thrown into the Central Cathedral prison.[† 6][† 2]
24th Day of the 5th Month
- Beginning of Chapter 6
- ~03:00 : Kirito and Eugeo escape from the Central Cathedral prison.
- The two encounter Integrity Knight Eldrie Synthesis Thirty-one and battle with him. The battle is interrupted after the two boys start reminding Eldrie of his past life and Deusolbert Synthesis Seven interferes.
- ~06:00 : Cardinal rescues the boys by leading them to the Great Library Room.
- End of Chapter 6
- Beginning of Chapter 7
- ~09:00 : Kirito and Eugeo leave the Great Library Room and arrive on the 3rd floor of the Central Cathedral.
- End of Chapter 7
- Beginning of Chapter 8
- Kirito and Eugeo defeat Deusolbert Synthesis Seven.
- ~11:00-12:00 : Kirito and Eugeo meet Fizel and Linel, who attempt to paralyze the intruders with poison.
- Kirito and Eugeo defeat Fanatio Synthesis Two, as well as her 4 accompanying Knights, in battle. Fanatio is mortally wounded and Kirito uses one of Cardinal's daggers to have Cardinal save the dying Knight.
- Kirito and Eugeo encounter Alice Synthesis Thirty on the 80th floor of the Central Cathedral. During the battle, Kirito and Alice fall out of the Cathedral after accidentally breaking its wall during their battle.
- End of Chapter 8
- Beginning of Chapter 9 and 10
- ~15:00 Kirito manages to stop his and Alice's descent by stabbing his sword into a gap in the wall. They soon start ascending the cathedral using pitons generated via Sacred Arts and ascend to where the eighty-fifth floor is located by nightfall.[† 17]
- Kirito and Alice encounter gargoyles guarding the walls of the cathedral and, after defeating them, take shelter on a gargoyle terrace.
- End of Chapter 9[† 17]
- Eugeo fights with Bercouli Synthesis One. At the end of the battle, Eugeo released his sword's recollections, freezing Bercouli in place.[† 17]
- Chief Elder Chudelkin casts a Sacred Art that "deep freezes" Bercouli. Chudelkin then seizes Eugeo.[† 17]
- End of Chapter 10
- Beginning of Chapter 11
- 20:00-21:00 : Alice overcame her «Seal of the Right Eye».
25th Day of the 5th Month
- Just after 00:00 - Eugeo is tempted by Quinella and removes his "Core Protection"
- End of Chapter 11
- Beginning of Chapter 12
- Around 02:00 - Kirito fights with Integrity Knight Eugeo Synthesis Thirty-Two.
- Eugeo regains partial self control.
- End of Chapter 12
- Beginning of Chapter 13
- Kirito nearly kills Chudelkin.
- The Sword Golem is formed.
- Charlotte dies.
- Cardinal arrives to Quinella's room.
- Eugeo, along with Alice's memory fragment, are turned into a sword.
- Cardinal dies.
- Eugeo-Sword is broken.
- Kirito dual wields against administrator.
- Terminal that connects to the real world is revealed.
- Chudelkin is burnt.
- Quinella's soul vanishes.
- Kirito remembers a locked memory fragment.
- Eugeo names Kirito's black sword.
- The Lightcube storing Eugeo's Fluctlight and another other storing the memory fragment of Alice are formatted.
- Kirito contacted the real world via the terminal.
- Seijirou asked Kirito to bring Alice to the World End Altar.
- Kirito's Fluctlight was damaged.
- End of Chapter 13
10th Month of the HEC, 380
- Beginning of Volume 15 Chapter 15.
22nd Day of the 10th Month
31st Day of the 10th Month
- Alice leaves for the Great East Gate.
- End of Volume 15 Chapter 15
11th Month of the HEC, 380
- Beginning of Volume 15 Chapter 17.
2nd Day of the 11th Month
- Alice arrives at the camp of the Human Empire Defense Army.
3rd Day of the 11th Month
- Vixur Ul Shasta dies, killing Fu Za, Hagashi and Kuberi in the process. Vecta survives Viksul's attack without a scratch.
7th Day of the 11th Month
- The army of the Dark Territory arrives at the base of a mountain overlooking the Great East Gate.
- End of Volume 15 Chapter 17
- Beginning of Volume 16 Chapter 18.
- Sunset - Collapse of the Eastern Gate.
2nd Month of the HEC, 382
17th Day of the 2nd Month
- Kirito's public demonstration/trial of Mechanical Dragon.
- Kirito damaged Central Cathedral for the second time.
18th Day of the 2nd Month
19th Day of the 2nd Month
- 05:00 - Kirito and Ronye leave the Central Cathedral for Obsidia.
- While some places indicated the date Nov. 5, that's for store-front sales, so this date is probably the sale over the Internet.
- Date reference
- 40 minutes after the First Floor was cleared.
- The timeline only indicates March, 2023, but The Day After indicated that the Knights of the Blood were formed after the defeat of the 25th Floor's boss.
- In the anime, this date was changed to June 12th, 2023.
- Time reference
- In the anime, this date was changed to April 11th, 2024
- In the anime, this date was changed to April 12th, 2024
- In the anime, this date was changed to October 24th, 2024
- The date is incorrectly labelled as October 25 in the story itself, despite it taking place the day after ME 11-13.
- Date reference
- Time reference
- Time reference
- Relative date reference.
- In the anime, this event was moved to February 11.
- 4th April according to calendar
- Order unknown
- Ordinal Scale pamphlet
- Gun Gale Online Volume 1 SECT.1
- SII Episode 14
- Sword Art Online Magazine Vol.2
- Kawahara's Twitter message.
- Kawahara's Twitter message.
- Kazuto was not even one year old when this happened, according to V3P.
- Tweet by the author about Yuuki's birthday.
- Yuuki's and Aiko's fourteenth birthdays were on May 23, 2024, according to Sisters' Prayer, and Yuuki was said to be 15 years old in Volume 7.
- The Fourteenth Autumn
- 15 years before the events of volume 5, chapter 4.
- Suguha claimed that Kazuto only had experience in bamboo sword when he is 7-8
- 7-8 years before the events of ME 5 - Salvia.
- When Kazuto was 10 years old, according to Volume 3, Prologue
- When Shino was 11 years old, after the start of the second school semester, according to V5C4.
- 5 years before 2026, Volume 10, Chapter 2, Part 2
- Volume 1, Chapter 2
- The First Day
- Progressive Volume 1, Aria of a Starless Night, Part 14
- Progressive Manga Chapter 1
- Episode 1
- Players had been in queue for 4 days before Sword Art Online's offline sales officially began.
- The game's offline sales began the day before the official service.
- Volume 1, Chapter 3
- The tutorial ended 3 hours before Kirito returned to Horunka to receive the reward for his quest.
- Sword Art Online - Aincrad Volume 01 Chapter 2 Page 26
- It was said in Volume 1, Chapter 4 that it happened approximately 3 hours after the death game started.
- First death was recorded at around 20:30 Aincrad Standard Time (wasn't Coper's death, so it had to be after this time), while Kirito returned to Horunka by 9 PM., according to The First Day.
- Volume 3 p.37 last line, "SAO事件勃発後すぐに結成されたらしいのだが" formed immediately after SAO incident
- Winter, around the time Kazuto was trapped in SAO, according to V3P
- One month into the game, according to Volume 1, chapter 4.
- According to Progressive Volume 4, Part 7, the incident took place within the month before New Year's Eve, around the time when the enhancement scam was taking place.
- Progressive Volume 1 Aria in the Starless Night, Part 2
- Progressive Volume 1, Aria of a Starless Night, Part 4.
- Progressive Volume 1, Aria in the Starless Night, Part 6.
- Progressive Volume 1, Aria of a Starless Night, Part 9.
- Progressive Volume 1, Aria of a Starless Night, Part 7
- Progressive Volume 1, Aria of a Starless Night, Part 11.
- Progressive Volume 1, Reason for the Whiskers
- Kirito spent 3 days and 3 nights to finish the quest, according to Progressive Volume 1, Intermission
- Progressive Volume 1, Rondo of a Fragile Blade, Part 1
- Progressive Volume 1, Rondo of a Fragile Blade, Part 5
- The same day that Kirito and Asuna entered the Labyrinth, which they did on December 9th, 2022, according to Progressive Volume 1, Rondo of a Fragile Blade, Part 8
- Progressive Volume 1, Rondo of a Fragile Blade, Part 10
- Progressive Volume 1, Rondo of a Fragile Blade
- Progressive Volume 1, Rondo of a Fragile Blade, Part 11
- The fight occurs shortly after Kirito and Asuna's arrival on the 3rd Floor following the 2nd Floor boss fight, according to Progressive Volume 2, Concerto of Black and White, Part 1
- 39 days after the game started, according to Progressive Volume 2, Part 3
- Progressive Volume 2, Concerto of Black and White, Part 5
- Progressive Volume 2, Concerto of Black and White, Part 9
- Progressive Volume 3, Barcarolle of Froth, Part 1
- 50 minutes after the 3rd floor boss was defeated, according to Progressive Volume 3, Barcarolle of Froth, Part 2
- 1 hour after the 3rd floor boss was defeated, according to Progressive Volume 3, Barcarolle of Froth, Part 2
- Progressive Volume 3, Barcarolle of Froth, Part 6
- Progressive Volume 3, Barcarolle of Froth, Part 8
- Progressive Volume 4, Scherzo of Deep Night, Part 7
- Progressive Volume 4, Scherzo of Deep Night, Part 5
- Progressive Volume 4, Scherzo of Deep Night, Part 9
- Progressive Volume 4, Scherzo of Deep Night, Part 10
- Volume 1, Chapter 17
- Took place shortly after the New Year countdown in Progressive Volume 4, Scherzo of Deep Night, Part 12
- Progressive Volume 5, Canon of the Golden Rule, Part 1
- SAOP 4.1
- Progressive Volume 5, Canon of the Golden Rule, Part 4
- Progressive Volume 5, Canon of the Golden Rule, Part 5
- Sword Art Online Material Edition 21
- Sisters' Prayer part 1, 3 months after SAO incident start
- Hopeful Chant Aincrad Arc chronology.
- Episode 03
- Progressive Volume 2 Afterword
- Created 6 months after the beginning of SAO, according to Volume 3 Chapter 1.
- Weekly Argo newspaper in Episode 3
- The 27th Floor Labyrinth is said to be 3 floors below the front line[Clarification needed]
- The Day After
- Hopeful Chant Part 2
- Hopeful Chant Part 5
- ALfheim Online was released twelve months after the SAO incident, according to Volume 3, chapter 2.
- A month before Christmas and two weeks before Kirito's encounter with Klein, according to Volume 2, Red-Nosed Reindeer, Part 1
- Volume 2, Red-Nosed Reindeer, Part 3
- Nicholas the renegade spawned at midnight, according to Volume 2, Red-Nosed Reindeer, Part 1.
- Kirito got back to his hotel at around 3 AM, while the boss spawned at midnight.
- Volume 2, Red-Nosed Reindeer, Part 4
- Volume 10, Chapter 4, Part 3 mentions that he got the sword from a boss on the 50th Boss. The front line was still at the 49 by Christmas.
- In volume 3, chapter 2, it is said that Leafa and Recon had been playing ALO for nearly a year in January 20.
- Stated in Volume 5 that the guild was announced 1 day after the New Year's Eve of 2023
- Killed 10 days before the Titan's Hand guild was arrested on the 47th Floor, according to The Black Swordsman side story.
- The Black Swordsman[Clarification needed]
- Episode 04
- Opened three months before the events of Warmth of the Heart, according to Volume 2, Warmth of the Heart, Prologue.
- Episode 05
- One day after Kirito and Asuna's duel.
- Date on Monument of Life in Volume 8, A Murder Case in the Area Part 3
- It was said that the 5 o'clock bell chimed as the "avenger" escaped.
- Sisters' Prayer part 1
- Warmth of the Heart Part 2
- Episode 7
- Stated in the novel that it happened the day after Asuna left to meet up with Kirito
- 2 days after Kirito and Asuna's meeting.
- Sound of Water, Sound of Hammer
- Volume 5, Chapter 6
- Material Edition 17
- Story Pencil Board (Dengeki Bunko Magazine vol. 30)
- According to Volume 1, Chapter 8, the day the Aincrad Liberation Force challenged the 74th Floor's boss (Oct18) is the 9th day after they started clearing the floor.
- Volume 1, Chapter 5
- According to Volume 1 Chapter 6, these two events happened one day before Kuradeel challenged Kirito
- Volume 1, Chapter 7
- In Volume 1, Chapter 12, it was said that Kirito met with Heathcliff the day after this day's event.
- Kirito proposed to Asuna 4 days after The Gleam Eyes was defeated according to The Day Before
- Episode 8
- Volume 1, Chapter 10
- Volume 1, Chapter 11
- Volume 1, Chapter 12
- A day after defeating 74th Floor Boss.
- Volume 1, Chapter 13
- Kirito wears Knights of the Blood's white uniform for the first time 2 days after Kirito's duel with Heathcliff, according to Volume 1, Chapter 14
- Kuradeel killed Godfree the next day according to Volume 1, Chapter 14-15
- Two days before the events of The Day Before
- The Day Before
- Three days after Kirito's first duel with Heathcliff, according to Volume 1, Chapter 14
- Material Edition 10
- Material Edition 11
- Material Edition 12
- Took place between Material Editions 11 and 12
- Episode 11
- Material Edition 13
- Material Edition 14
- The day after the marriage, according to ME14.
- Part 3 of Material Edition 14 takes place the morning after the story begins.
- Material Edition 15
- Material Edition 16
- Material Edition 18
- The last Field Boss was defeated a day before Klein's meeting with Asuna and Kirito in Material Edition 19.
- Takes place immediately after ME18
- Six days after Kirito and Asuna got married and moved to the 22nd Floor, according to Volume 2, Morning Dew Girl, Part 1
- Episode 12
- Left one day after the event at the Hidden Dungeon.
- 10 days after Kirito and Asuna moved into their new home.
- Had to happen between the time Kirito and Asuna met Nishida and the day they left for the front line.
- 3 days after Kirito and Asuna met Nishida, according to Volume 1, Chapter 19
- According to Heathcliff's report in Volume 1, Chapter 20
- The day after Asuna defeated the King of Lakes[Clarification needed]
- Kirito and Asuna waited three hours before reporting to the Collinia Teleport Gate Plaza[Clarification needed]
- Volume 1, Chapter 21
- The Floor Boss was defeated over an hour after the raid group entered the boss room, according to Volume 1, Chapter 22
- Volume 2, Warmth of the Heart, Part 4
- Interview with SAO: HF game's producer in Taiwan
- The Final Promise
- Volume 4 Chapter 9
- Volume 3 Chapter 1
- Kunori's Tweet
- The day after Kirito's first meeting with Leafa.
- Leafa claimed that it was already past 2 AM when they got trapped in Jötunheimr, according to Volume 4, Chapter 5.
- After midnight of the day Kirito and Leafa interfered with the Salamander attack on the Sylph and Cait Sith meeting.
- According to Volume 4, Chapter 5, it was already past 3 AM when Kirito and Leafa began travelling on Tonkii, but they reached Alne before 4 AM.
- System announcement claims that it was nearing 4 AM.
- In the afternoon of the day during which Kirito and Leafa escaped from Jötunheimr to Alne.
- It was 3PM when they logged in, according to volume 4, chapter 7.
- VRMMO Development Tragedy
- Silica Edition A Spot of Sunshine in the Winter
- 8 months before events in Volume 5#Chapter 4
- Celeste Fairy
- Episode 25
- Sword Art Online History Chart 2014 temporary edition, included in an attachment of Dengeki Bunko Magazine Vol.37
- Just before Shino joined GGO
- Half a year before the 3rd BoB, according to Volume 6 Chapter 8
- The Day After Part 2
- The Day After Part 4
- Extra Edition
- Directly succeeds the Extra Edition
- Rainbow Bridge part 4
- Volume 7 Chapter 1
- 3 months before the events of Volume 5, Chapter 3. Chapter 4 was said to have taken place 156 days after the academic year start (April for Japan), while it was said that the events of Chapter 3 happened the day before.
- SII Episode 02
- Volume 5, Chapter 1
- Volume 6, Chapter 13
- 8 months after GGO was created, according to Gun Gale Online Volume 1 SECT.2.
- Volume 5, Chapter 2
- 4 hours before Kazuto meets Asuna, as described in SII episode 1
- SII Episode 1 Asuna phone time
- One week after Kazuto's meeting with Kikuoka as stated in Volume 5 Chapter 6.
- The day before Volume 6's Chapter 7
- Volume 6, Chapter 7
- Volume 6, Chapter 10
- Chapter 14 states that the tournament lasted for 2 hours, 4 minutes and 37 seconds. Tournament began at 20:00 (8 pm) according to Volume 6's chapter 7.
- Within a 40 minute interval, according to Volume 6 Chapter 16
- Within 2 hours after the arrest of the other two.
- 40 hours after the end of 3rd BoB incident as stated in Volume 6's chapter 16.
- 2 weeks before Calibur events, according to V8Calibur.
- SII Episode 18
- MMO Tomorrow report on Andrew's tablet in SII Episode 18
- Volume 8, Calibur, Part 1
- Calibur SS
- After New Year
- The day after Volume 7 Chapter 1
- Happened the day after Asuna met with the Sleeping Knight
- Volume 7 Chapter 10
- Gun Gale Online Volume 1 SECT.3
- chromatic colors Part 1
- Gun Gale Online Volume 2, SECT.1
- Gun Gale Online Volume 2, SECT.2
- Gun Gale Online Volume 2, SECT.4
- Volume 7 Chapter 11
- Volume 7 Chapter 12
- Ordinal Scale manga chapter 1
- YUNA's advertisement for her concert during the TV segment at the beginning of Ordinal Scale
- A month before Shino, Kazuto and Asuna's meeting at the Dicey Cafe, according to Volume 9, Prologue II, part 2.
- Cordial Chords Part 3
- Asuna's calendar in Ordinal Scale
- Cordial Chords Prologue
- Cordial Chords Part 2
- a week before Volume 9 Prologue II
- Volume 9 Prologue I, Prologue II part 1,3
- In Volume 9 Prologue II, Parts 1 and 3 it was stated that Kazuto slept continuously during that Friday to Sunday for his part-time job at Rath. According to Volume 10, Chapter 2, Part 1, that day was June 29, while the calender states that June 29, 2026 is a Monday.
- Kirito, Eugeo and Alice were 11 in 372HEC (Prologue I)
- Volume 10, Chapter 2, Part 1
- Two days after Kazuto was attacked by Johnny Black, according to Volume 10, chapter 2, part 1
- Volume 10, chapter 2, part 2
- Volume 13 Interlude IV
- 40 minutes before Volume 15 Chapter 16
- Volume 16, chapter 19, end of part 5
- Volume 16, chapter 19, part 7
- Volume 16, chapter 19, part 7
- Volume 18, chapter 23, part 1
- 3 days to the end of summer holiday.
- Excerpt (Vol 9, page 115, line 11 (Prologue II, Part 1): ないじゃない？ ちょっと気が早いけど、年末の第五回BoBに向けて、ソイツを予約しとこ.
- Cardinal states that UW was created 450 years before 380 HEC.
- Stated in Volume 11 Chapter 6 Part 3 that the "Original Four" stayed for 18 UW years. 70-18=52
- Stated in Volume 11 Chapter 6 Part 3 that Quinella founded the Axiom Church when she was 13
- Stated in Volume 11 Chapter 6 Part 3 that it was formed roughly 350 years before 380
- Bercouli established the village after the Axiom Church was founded and his village had already been founded when Quinella got the power to experiment with Fluctlights
- Stated in Volume 11 Chapter 6 Part 3 that she found it at the age of 80. 17+80=97.
- Quinella could only start such experimentation when she had acquired a max level of SC authority and had perfected it enough by the time she used it on herself.
- Happened when Quinella was about 100 years of age. 17+100=117
- Quinella was reaching 150 years of age at the time. 17+150=167.
- Happened after Quinella accidentally allowed Cardinal to take up a body of her own
- Alicization Episode 01
- Prologue I
- Alicization Episode 02
- Volume 9 Chapter 1
- Two days after Kirito first met Eugeo.
- Volume 10 Chapter 3
- Volume 10 Chapter 4
- The school year in the Sword Mastery Academy, like in Japanese schools, begins in April/4th month.
- Volume 11 Chapter 5
- Volume 11 Chapter 6
- It was stated that Kirito and Eugeo were assigned valets 1-1.5 months before 17th Day of the 5th Month.
- Eugeo's talk with Tiese happened one day before the 22nd, while the picnic happened 1 day before the talk.
- Volume 11, Chapter 5, Part 1.
- Volume 11, Chapter 6, Part 1
- The day after Raios died, according to Volume 11, Chapter 5, Part 5.
- Volume 12 Chapter 7
- Volume 12 Chapter 8
- Volume 13 Chapter 9
- Volume 13, Chapter 10 describes actions Eugeo took after Kirito and Alice were blown out of Cathedral's wall
- Volume 13, Chapter 10
- In Volume 13 Chapter 11, it said that after Alice had done so, Kirito waited for her and hoped she would wake up from her state of unconsciousness caused by a Fluctlight shock, and then used about 2 hours to climb to the 95th Floor, and at the time they reached 95th Floor, the time had just passed 12
- Kirito had mentioned that he had heard the clock for 8 o'clock.
- Volume 13, Chapter 11
- Volume 14, Chapter 12
- Volume 15 Chapter 15 Part 2
- Alice's journey took three days, according to volume 15, chapter 17, part 3.
- Volume 15, Chapter 17, Part 3
- Four days before the Dark Territory's began mobilizing to the Great Gate, according to Volume 15, Chapter 17, Part 7
- Volume 15, Chapter 17, Part 7
- Cradle of the Moon Part 15
- Cradle of the Moon Part 1
- 3 years after Ronye first met Kirito
- Cradle of the Moon, Part 9
- Cradle of the Moon, Part 11
- Cradle of the Moon, Part 20