Unified Story Timeline

This is a list of events in Toaru Majutsu no Index listed in a timeline fashion.

Several Years Ago

 * Kiyama Harumi teaches a group of Child Errors for an experiment.
 * The experiment results in the children going comatose, leaving Kiyama Harumi within an intense desire to save them.

Autumn to Winter

 * Shirai Kuroko meets Uiharu Kazari in Judgment Training School.
 * Kazari and Kuroko are dragged into a commotion brought up by robbers in a post office.
 * The robber with the "Equal Speed" ability injures Kuroko; meanwhile, she receives unexpected assistance from Misaka Mikoto and Kuroko successfully apprehends the robbers.

July (one year before the Index Arc)

 * Index awakens in an alleyway in Japan without any personal memories. However, she still remembers things related to Necessarius, the Grimoires and magic.

Third Week

 * The activities of Skill-Out leader Komaba Ritoku attracts the attention of Yomikawa Aiho. Hattori Hanzou falls in love with Yomikawa. (At this time, the hunt for Level 0 Espers have noticeably increased.)

First Week

 * Kanzaki Kaori cooperates with a perverse jeans shop owner to pursue a Valkyrie who likes to tear up jeans.

Fourth Week

 * Kamijou Touya meets Balbina, a seller of magical souvenirs, and later, Lidvia Lorenzetti. Lidvia gives him an addition to his magical relic collection.

March 15

 * The seventh Level 5, Sogiita Gunha, fights against Skill-Out to save Haratani Yabumi.

First Week

 * In Brazil, Misaka Tabikake meets an impoverished girl named Ines and gives her advice about setting up a business of collecting rare metals.

Fourth Week

 * Shirai Kuroko enrolls into Tokiwadai Middle School and meets Misaka Mikoto.
 * Kuroko talks with people inside a hairdressing salon in Sakashima Wayside concerning Gemstones and the Stargate Project.

Second Week

 * Ollerus visits a town in Milan in Italy to destroy an organization that specializes in human trafficking.

May 11 (three months before August 11)

 * Misaka 9982 is produced.
 * A female researcher inside a scientific facility orders MISAKA clones to dispose the remains of a handful of clones killed in past experiments.

Fourth Week

 * Hamazura Shiage suspects SHINOBI Soldier Hattori Hanzou of planning a covert extermination in their district.

Second Week

 * Kuyama Kihan challenges the Goalkeeper System, is defeated.

June 17 (one month before July 17)

 * Kuroko become roommates with Mikoto after forcing her previous roommate to move.
 * Mikoto meets Kamijou Touma for the first time after he tries to save her from delinquents and accidentally enraging her. Mikoto would later meet Touma again several times trying to fight him after this event.

First Week

 * In a bar-room in London, Kamijou Touya meets Misaka Tabikake and a certain Mr. Tanaka by chance.
 * A female girl, a Gemstone, flees from her pursuants; in the end, she hijacks a Cessna which then explodes, possibly killing her.

Second Week

 * Kumokawa Seria contacts one of Academy City's directors Kaizumi Tsugutoshi and they had a conversation regarding treatment of Gemstones.
 * Kamijou Touma meets Seria by chance after seeing her praying alone in the rain coming from a sprinkler.

July 16

 * The Level Upper Arc begins
 * Shirai Kuroko responds to the emergency call of a robbery initiated by a group of robbers led by a Level 3 Pyrokinesist, interrupting Misaka Mikoto's first day hanging out with their new friends Uiharu Kazari and Saten Ruiko.

July 17

 * Konori Mii, mistaking Misaka Mikoto for a new recruit, takes the latter into a hands-on tour on being a member of Judgment.
 * Kamijou Touma shops for dinner in a convenience store and is confronted by Misaka Mikoto, challenging him to a fight against her. The fight leaves Touma fleeing from Mikoto through the night.

July 18

 * Level 3 "Synchrotron" Kushiro Katabira is linked to the incidents of explosions that alarmed District 7.
 * Kamijou Touma and Misaka Mikoto save Uiharu Kazari from an explosion caused by the Graviton Bomber in a shopping centre.

July 19

 * Uiharu Kazari is taken ill with a cold. Misaka Mikoto, Shirai Kuroko and Saten Ruiko research into the Level Upper.
 * Kamijou Touma interferes with Misaka Mikoto's attempt to extract information from some thugs at a restaurant.
 * The Index Arc begins
 * Kamijou Touma is confronted on a bridge by Misaka Mikoto after trying to protect the thugs from her wrath. Their meeting causes a city-wide blackout.

July 20

 * Kamijou Touma meets Index on his balcony. After feeding her and learning of the existence of magicians, Index leaves.
 * Kaitabi Hatsuya falls into a coma.
 * Saten Ruiko finds the Level Upper.
 * Misaka Mikoto, Shirai Kuroko, Uiharu Kazari and Saten Ruiko meet with Kiyama Harumi to discuss the existence and properties of the Level Upper.
 * Misaka Mikoto meets Kamijou Touma and once again challanges him, but Touma dismisses her attempts. Misaka Mikoto loses confidence in her own abilities.
 * Shirai Kuroko tracks down the thugs from the day before and enquires about the Level Upper.
 * Kamijou Touma returns home where he is attacked by Stiyl Magnus. After winning the fight, he takes an injured Index away.
 * Index is taken to Tsukuyomi Komoe's house. Using magic, the wounds she has received are healed.

July 21

 * Kamijou Touma and Index are given refuge at Tsukuyomi Komoe's house for the next three days.
 * Saten Ruiko defends Koujun Kikuhiko from a group charging money for use of Level Upper.
 * Shirai Kuroko destroys a building in order to defeat Trick and save Saten Ruiko. Feeling powerless and scared, Saten Ruiko shares the Level Upper with her school friends.

July 24

 * Misaka Mikoto recovers her determination to defeat Kamijou Touma.
 * Saten Ruiko falls into a coma due to her Level Upper use.
 * With Heaven Canceler's help, the creator of the Level Upper is found.
 * Kiyama Harumi takes Uiharu Kazari hostage to stall for time while she attempts to make calculations using the Level Upper network.
 * Misaka Mikoto faces off against Kiyama Harumi.
 * Misaka Mikoto defeats the AIM Burst.
 * Kiyama Harumi is taken into custody.
 * Saten Ruiko and the other victims of the Level Upper wake from their comas.
 * The Level Upper Arc ends
 * Kamijou Touma and Index attempt to visit a bathhouse.
 * Kamijou Touma is attacked by Kanzaki Kaori. After learning of Index's memory erasing and the relationship between Stiyl Magnus, Kanzaki Kaori and herself, he attempts to force Kanzaki to abandon her pursuit. He is defeated and remains unconscious for three days.

July 25

 * Misaka Mikoto and Shirai Kuroko are forced to spend the day cleaning the pool after breaking curfew the previous night.

July 27

 * Kamijou Touma awakens after three days and affirms his desire to protect Index.
 * Stiyl Magnus and Kanzaki Kaori arrive at Tsukuyomi Komoe's house to perform the memory erasing ritual at midnight.
 * Kamijou Touma accidentally awakens Index in John's Pen mode, causing her to go on a rampage.

July 28

 * Kamijou Touma persuades Stiyl Magnus and Kanzaki Kaori that they have been deceived by the Church. They work together to try and restrain Index.
 * Tree Diagram is destroyed when Kamijou Touma deflects a powerful attack from Index.
 * Kamijou Touma loses his memories after protecting Index from the fallout of one of her own attacks.
 * As Kamijou Touma recovers in hospital, he lies to Index about his memory loss to alleviate her pain.
 * The Index Arc ends

First Week

 * The Big Spider Arc begins
 * The Big Spider Arc ends
 * The Poltergeist Arc begins
 * The Poltergeist Arc ends

August 8

 * The Deep Blood Arc begins

August 9

 * The Deep Blood Arc ends

August 10

 * The Sisters Arc (Railgun) begins

August 20

 * The Sisters Arc (Index) begins

August 22

 * The Sisters Arc ends

August 27

 * The Angel Fall Arc begins

August 30

 * The Angel Fall Arc ends

August 31

 * The Three Stories Arc occurs

September 1

 * The Kazakiri Hyouka Arc occurs

September 8

 * The Orsola Aquinas Rescue Arc begins

September 9

 * The Orsola Aquinas Rescue Arc ends

September 14

 * The Tree Diagram Remnant Arc begins

September 15

 * The Tree Diagram Remnant Arc ends

September 19

 * The Daihaseisai Arc begins

September 20

 * The Daihaseisai Arc ends

September 25

 * The La Regina del Mare Adriatico Arc begins

September 29

 * The La Regina del Mare Adriatico Arc ends

September 30

 * The Academy City Invasion Arc occurs

October 4

 * The Terra of the Left and the Document of Constantine Arc begins

October 8

 * The Terra of the Left and the Document of Constantine Arc ends

October 9

 * The Battle Royale Arc occurs

October 10

 * The Itsuwa and Acqua of the Back's Attack Arc begins

October 16

 * The Itsuwa and Acqua of the Back's Attack Arc ends

October 17

 * The War in Britain Arc occurs
 * The Dragon(≠Angel) Arc occurs

October 18

 * The Fiamma of the Right and World War III Arc begins

October 30

 * The Fiamma of the Right and World War III Arc ends