Unified Story Timeline

The Unified Story Timeline lists events in the Toaru Majutsu no Index universe, ordered chronologically. This timeline tries to harmonize all the events of all the mediums that tell the stories of the Toaru Majutsu no Index universe, so long as they are canon, things that happen in the story as it goes, things that have come to pass or mentioned is passing, and things that may. This bars videogames, parodies, and audio dramas unless they can be determined where on the timeline they are. Discrepancies will surely abound, but this is the fate of a franchise that has spanned greatly in several mediums and in the hands of several people.

For the timeline exclusively for the anime visit the Anime Timeline page.

Outside the timeline

 * Othinus becomes a Magic God, and using her powers starts adding Phases on the world several times. She later settles with the current world, where Kamijou Touma would later be born and become a bearer of the Imagine Breaker.
 * The man who calls himself Silver Star attempts to tamper with the Pure World beyond all the filters.

1st Century AD

 * The Son of God is put to trial, and is later crucified by the Romans. He later dies by a stab from a spear to his chest. The Son of God, however, later resurrects and ascends to heaven three days after his death.

June 29

 * St. Peter is executed, though preparing well ahead of time, Peter chose the grounds of what would now become the Vatican, where the Croce di Pietro (prepared before his death) would later be erected on his tomb and establish the center of Christianity.

4th Century AD

 * , as a sign of respect towards St. Peter, orders the construction of St. Peter's Basilica. It is later finished, and built over the tomb of St. Peter.

Middle Ages

 * Records of a woman by the name of Fräulein Kreutune, who can survive any form of trial after being deemed a Witch, are first mentioned.

8th Century AD

 * The.

9th Century AD

 * Due to the increasing power gained by Venezia, La Regina del Mare Adriatico was created by the Roman Catholic Church to destroy the city, its influences, and its culture.

829

 * Merchants bring the remains of into Venezia, thereby expanding the power and influence of Venezia. St. Mark's Basilica is later built to house his remains.
 * Construction of La Regina del Mare Adriatico is finished. However, it was not used due to the fear of economic disaster that would be brought about by Venezia's destruction.

1182

 * Ladylee Tangleroad is born, and eventually becomes a.

1189–1192

 * The takes place, most likely the Crusades that Ladylee may have participated in as a young girl.
 * Ladylee Tangleroad becomes immortal after eating ambrosia given to her by a soldier she saved during the Crusades.

1309

 * The begins, having the Pope move from the Papal States to Avignon. The Vatican–Avignon Ley line is later established.

1346–1350

 * The reaches its peak in Europe, killing millions.

1378

 * The Avignon Papacy ends.

1546

 * is commissioned for architectural work on St. Peter's Basilica.

1549

 * arrives in Japan, and later, on the island of Kyuushu begins preaching Roman Catholicism, where the future Amakusa Christians would form.

1603

 * The begins with the forming of the, and part of its impact is the persecution of all foreign influences on its territory, including Christianity. The Amakusa Church is then forced into hiding.

1642-1646

 * The occurs. The Curtana Original is lost after its power goes out of control, allowing the revolution to succeed.

1821

 * The Great Japanese Coastal Map by is published, where Tadataka plotted the 47 Portals of Japan, a complete reversal of Idol Theory.

May 3

 * The begins and the Edo period and the Tokugawa shogunate ends. The Amakusa Church however, continues to remain in secrecy.

1870

 * Ladylee Tangleroad visits Paris, and has her picture taken with two other men.

October 12

 * Edward Alexander Crowley is born.

1917

 * The grimoire known as Moonchild is published by Aleister Crowley.

1920

 * Aleister Crowley goes to Sicily, Italy, in order to carry out his activities.
 * Rumors of the Book of the Law as dictated by Aiwass, surface.
 * Aleister proclaims the end of the Aeon of Osiris and the beginning of the Aeon of Horus coinciding with the writing of the Book of the Law.

1923

 * Aleister's days in the island of Sicily end.

June 7

 * The is ratified by the  and the, formally establishing the sovereignty of Vatican City.

1947

 * The between the United States of America and the  begin, with both sides pouring money into the research of esper development for military use some time later during the conflict.

December 1

 * Edward Alexander Crowley is officially recognized as dead. However, it is revealed that he survived, escaped into the remote English countryside, and was later found by Heaven Canceler, who nurses him back to health and tells him of the faraway country of Japan.

1970s

 * The United States of America's Stargate Project begins.

1990

 * The starts. The Metal Eater MX is used during the war.

1991

 * The Gulf War ends.

1995

 * The Stargate Project is canceled.

Unknown number of years Ago

 * A great distortion of the four elements allows the Angels to bypass the names God has given them, has their alignments to the four elements switch, and finally allows the possibility of an angel falling down to Earth.
 * The legend and identity of St. Germain, previously fake, is given "life".
 * Academy City is formally established by Aleister Crowley. He later enters the Windowless Building and imprisons Fräulein Kreutune there.
 * The parents of Agnese Sanctis are killed, and she is later forced to live in the streets of Milan for a time before being taken in by the Roman Catholic Church, where she meets Lucia and Angelene.
 * Kihara Gensei uses his granddaughter as the First Sample for the Crystallized Esper Essence.
 * Heaven Canceler criticizes Kihara Gensei for developing the Crystallized Esper Essence to achieve SYSTEM.

October 9

 * Academy City gains its independence as a sovereign city-state.

20 Years Ago

 * Twenty years prior to the start of the series, Sherry Cromwell was part of a secret sect that was created within the Anglican Church to create a Magician-Esper hybrid. She was the one who taught the esper known as Ellis, a child like her, magic and spell, and became good friends with him. However, when Ellis tried to use magic, the contradictions between magic and AIM proved fatal for Ellis, which burst his blood vessels and severely injuring him. At which point, operatives of the Knights of England came and destroyed the institution that Sherry and Ellis were in in, after the higher-ups of the Anglican Church realized that they were in contact with the science side, under the pretext of preventing the leakage of magic teachings and secrets, however, the true intention was because they didn't want magic to have any contact with science. The knights then killed Ellis, who used himself as a shield providing with Sherry enough time to escape. The event would traumatize the young Sherry Cromwell, becoming distrustful of the magic and science side, having a tremendous hate for the Knights of England, dedicating her magic name to her friend, and naming her golem after him.
 * An American Hollywood filmaker designs and makes a huge artificial island as a setting for a movie. At the end of the movie's filming, dismantling such a huge effort made by the crew is seen as a waste, so rather than being destroyed, the island is reborn as a seaside resort and theme park.

May 2

 * Misaka Mikoto is born.

10 Years Ago

 * The 1st Lancer Division of the 13 squads of the Knights of England are dispatched to Japan to take care of a minor situation (according to the Church) in a mountain village in Kyoto. Here they discover the lone survivor of an attack of vampire: out of fear of the Deep Blood of Himegami Aisa, a vampire had turned her entire village into vampires. They were, however, all killed by her power thereafter, making Aisa the lone survivor of the tragedy.
 * Problems with Princess Villian.
 * The Princess Villian hostage crisis occurs when the then 14-year old Third Princess Villian is kidnapped by the Spanish Astrological Sect, one of the few major cabals of the Roman Catholics, and is then abandoned by the British Royal Family because they hope to use her as an excuse to attack the magic cabal. Having their hands tied, the Knights of England can't interfere, so William Orwell resolves to enter the battlefield on his own, as his role as a mercenary gives him the freedom to do so. The Knight Leader wants to accompany him, but William knocks him out cold, so he could keep his position and try to change England from the inside to prevent another situation such as this one from happening again, something William can't do.
 * Politicians, presumably from the United Kingdom, try to use Princess Villian as bait in order to gain South America. They are later punished and taught a lesson by Queen Elizard using the Curtana Second.
 * Kamijou Touma, a fresh graduate of kindergarten, is sent to Academy City by his father, who believes that a place where superstition does not exist would be able to help his son from the terrible perception of people around him regarding his misfortune.
 * Reacting to Touma's Imagine Breaker, Kazakiri Hyouka gains a consciousness and is born within the Imaginary Number District.

5-6 Years Ago

 * Accelerator is caught up in an unfortunate incident where a group of children are hurt due to his powers, leading to Academy City forces trying to take him down. He is later sent into a special class as a result.
 * Misaka Mikoto willingly gives her DNA for the purpose of helping disabled children, not knowing that its purpose was to create military clones.
 * 5 years prior to the start of the timeline, the magic cabal Gate of the Gods Come from the Heavens organizes the Astra Reorganization for 15 of its members that had the best affinity for the use of the Brahma Astra. The project ends in disaster, with 14 of its members losing their lives, and only Ureapaddy Exica being able to wield the Astra limitedly and with the threat of damaging herself and others.

3 Years Ago

 * Aureolus Izzard secretly goes to England without the permission of the Roman Catholic Church in order to share his knowledge in decoding grimoires with the Church of England. Here, he later meets and becomes the partner of Index.
 * The Miracle 88 occurs, when Spaceplane Orion took an emergency landing in Academy City.
 * Meigo Arisa materializes into the world.
 * Academy City begins construction of Space elevator Endymion without revealing its purpose.
 * Acqua of the Back does battle against another Saint, the outcome of this battle is not known.

Spring

 * Kihara Kagun resigns from his job as a teacher due to an incident in which a young man erased from the records is corrupted by Kihara Byouri to attack a group of Kagun's students (which included Kumokawa Maria). Kihara Kagun charged towards the attacker, damaged his consciousness and killed him before a tragedy could occur. Despite the court's verdict making him innocent and his teacher licence still active, he decides to take revenge on the one who arranged the incident and disappears from Academy City.
 * Some time later, Kihara Kagun meets Marian Slingeneyer and she becomes his mentor, though she does not directly teach him much, as she thought it would be best for him to learn on his own. It is suspected that their relationship went beyond that of a mere student-teacher one.

August 2

 * An attempt to summon the sunken city of R'lyeh of the Cthulhu Mythos in the Pacific Ocean to induce "inspiration", by the Magic Cabal Dusk Waiting to Awaken led by Arlands Darkstreet, causes 103 workers onboard the Luxury & Ingot resource extraction ship Condor to go insane.

2 Years Ago

 * Kanzaki Kaori leaves the Amakusa-Style Remix of Church for the Anglican Church, making Tatemiya Saiji the proxy pope of the church. Kanzaki Kaori joins Necessarius and is later helped by Tsuchimikado Motoharu to become fluent in English.
 * Index becomes friends with Stiyl Magnus and Kanzaki Kaori, shortly after, her memory is wiped by the Church.
 * Konori Mii joins Skill-Out faction Big Spider.
 * Kurozuma Wataru is injured after a scuffle and is later taken into custody for rehabilitation; however, he is presumed dead. Konori Mii quits Big Spider while Hebitani Tsuguo takes over his identity and takes over Big Spider.
 * Shirai Kuroko joins Judgment.
 * Child Errors Edasaki Banri and Haruue Erii are separated from each other as Banri is moved to the Advanced Education Department.
 * Kiyama Harumi teaches a group of Child Errors for an experiment.
 * A large sports gym in New Delhi is attacked using Agni's Festival Fire.
 * Musujime Awaki, a student of Kirigaoka Girls' Academy Middle School, is asked to teleport into a room in town as a part of a test, but miscalculates the coordinates and accidentally teleports her leg into a wall, seriously injuring her. The incident traumatizes her and she is forced to attend therapy. Moreover, she is unwilling to teleport herself as the trauma would cause her to become nauseaus.
 * Misaka Mikoto reaches Level 5.
 * A young woman becomes pregnant of a girl who would later be known as the magician Freyja.

Last Year

 * The experiment in which Child Errors are used in order to gather data regarding the Crystallized Esper Essence is successful, but results in the children going comatose, leaving Kiyama Harumi, ward and teacher of the Child Errors, with an intense desire to save them.

April

 * Tsuchimikado Motoharu graduates from middle school, and goes into Academy City to become a spy for the Church. He chooses to adopt a young girl as his sister in order to fully deceive Academy City. However, he is quickly discovered to be a spy and is later forced to be a multi-agent in order to survive.
 * He later goes into the Power Curriculum Program, becoming an esper and rendering all his magic dangerous to use lest he puts his life in danger.

July (1 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.

Autumn

 * Shirai Kuroko meets Uiharu Kazari in the Judgment Training Center.
 * Shirai Kuroko, Konori Mii, and Uiharu Kazari are dragged into a robbery in a post office.
 * The robber with the Equal Speed ability injures Mii and Kuroko, but thanks to Uiharu getting the unexpected assistance of Misaka Mikoto, Kuroko successfully apprehends the robbers.

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 hunts for Level 0 espers have noticeably increased.)

January/February (6 Months Before the Big Spider Arc)

 * Kurozuma Wataru is released from custody.

First Week

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

Fourth Week

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

March 15

 * The seventh Level 5, Sogiita Gunha, fights against a Skill-Out group led by Yokosuka to save Haratani Yabumi.

First Week

 * In Brazil, Ines tells her story that Misaka Tabigake met her when she is poor, and gave 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 the city of Milan in Italy to destroy an organization that specializes in human trafficking.

May 11 (3 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, while speaking to Kuruwa, jokingly suspects that his friend Hattori Hanzou might be a the surviving descendant of a near-future-like Shinobi Soldier. To his surprise, it seems that he was right.

Second Week

 * Kuyama Kihan challenges a system defended by the name of "Goalkeeper" but is defeated, leading to his arrest.

June 17

 * Mikoto meets Kamijou Touma for the first time when he tries to save her from delinquents and accidentally enrages her. After this event, Mikoto would later meet Touma again several times, trying to fight him.

June 23

 * Kuroko becomes roommates with Mikoto after forcing her previous roommate to move.

July 1

 * Misaka Mikoto goes to Russia for a demonstration for Academy City's partners, and later gets involved with New Light.

First Week

 * In a bar in London, Kamijou Touya and his colleague Tanaka meet Misaka Tabigake by chance.
 * A female girl, a Gemstone, meets Touya, Tanaka, and Tabigake while fleeing from her pursuers.
 * Touya and Tanaka fake their own deaths by hijacking a Cessna and having it explode.

Second Week

 * Kumokawa Seria contacts Kaizumi Tsugutoshi, one of Academy City's directors, and they have a conversation regarding the treatment of Gemstones.
 * Kamijou Touma meets Seria by chance after getting soaked from a malfunctioning water sprinkler.

July 10

 * Level 4 Synchrotron Kushiro Katabira falls into a coma.

July 11 (One Week Before July 18)

 * The first of the Graviton bombings begins.

July 16

 * The Level Upper Arc begins (date based on the Toaru Kagaku no Railgun manga).
 * Shirai Kuroko, Uiharu Kazari, and Misaka Mikoto respond to a robbery initiated by a group of robbers led by a Level 3 Pyrokinesist.

July 17

 * A Judgment member, mistaking Misaka Mikoto for a new recruit, takes her into a hands-on tour on being a member of Judgment (date based on the Toaru Kagaku no Railgun manga).
 * Kamijou Touma is confronted by Misaka Mikoto, who challenges him to a duel at the riverbank. The fight ends with Touma fleeing from Mikoto through the night (date based on the Toaru Kagaku no Railgun manga).
 * Konori Mii and a fellow Judgment officer attempt to evacuate a Green-Mart after detecting graviton acceleration there. However, the bomb is triggered, severely injuring the fellow officer after he protected a girl with a leg injury.

July 18

 * Kushiro Katabira is linked to the incidents of explosions that alarmed District 7.
 * Kamijou Touma saves Misaka Mikoto, Uiharu Kazari, and a little girl from an explosion in Seventh Mist caused by the Graviton Bomber.
 * The Graviton Bomber is arrested.

July 19

 * Uiharu Kazari becomes ill due to a cold. Misaka Mikoto and Shirai Kuroko conduct research into the Level Upper.
 * Kamijou Touma accidentally interferes with Misaka Mikoto's attempt to extract information from Junta and his gang at Benny's (date based on the Toaru Kagaku no Railgun manga).
 * 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.
 * With the blackout, Index slips into Academy City. While jumping from rooftop to rooftop in order to flee from Stiyl Magnus and Kanzaki Kaori, she eventually ends up on the balcony railing of Kamijou Touma's dorm.

July 20

 * Summer break officially starts in Academy City.
 * Kamijou Touma meets Index on his balcony. After Touma feeds her and learns 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. Mikoto loses confidence in her own abilities.
 * Kuroko tracks down Junta and his gang from the botched investigation the day before, and enquiries about the Level Upper.
 * Kamijou Touma returns home, and 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, her severe wounds 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 Trick and his gang, who were charging money for a copy of the Level Upper.
 * Shirai Kuroko destroys a building in order to defeat Trick and save Ruiko and Kikuhiko. Feeling powerless and scared, Ruiko shares the Level Upper with her school friends Akemi, Muu, and Mako.

July 24

 * Misaka Mikoto regains her determination to defeat Kamijou Touma.
 * Akemi falls into a coma due to her use of the Level Upper.
 * Saten Ruiko falls into a coma due to her use of the Level Upper.
 * With Heaven Canceler's help, the creator of the Level Upper is revealed to be Kiyama Harumi.
 * Harumi takes Uiharu Kazari hostage to stall for time while she attempts to make calculations using the Level Upper network.
 * Mikoto faces off against Harumi. Harumi's subsequent defeat spawns the AIM Burst.
 * Mikoto defeats the AIM Burst.
 * Harumi is taken into custody.
 * Ruiko and the other victims of the Level Upper wake from their comas.
 * The Level Upper Arc ends (date based on the Toaru Kagaku no Railgun manga).
 * Kamijou Touma and Index head for a bathhouse.
 * Kamijou Touma is attacked by Kanzaki Kaori. After learning of Index's memory erases and the relationship between her, Kaori, and Stiyl Magnus, Touma attempts to force Kanzaki to abandon her pursuit. He is defeated and falls 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 (date based on the Toaru Kagaku no Railgun manga).

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.

July 28

 * Kamijou Touma accidentally awakens Index in John's Pen mode, causing her to go on a rampage.
 * Kamijou Touma tells Stiyl Magnus and Kanzaki Kaori that they have been deceived by the Church. The three of them work together to restrain Index.
 * 12:22 AM : 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 the hospital, he lies to Index about his memory loss to alleviate her pain.
 * The Index Arc ends.
 * An agreement is later established between the Anglican Church and Academy City for cooperation.

August

 * One month before August 31st, Etzali infiltrates Academy City under the orders of his faction, the Return of the Winged One, to judge if the growing Kamijou Faction is dangerous, and dismantle it if so.

August 1

 * A terrorist attempts to attack a conference building in School District 3 where a meeting between the Board of Directors and several leaders of other nations are taking place, using a vehicle carrying the additional module of Hikoboshi II filled with the dangerous Hydrazine liquid fuel. The driver is ordered to drive the vehicle towards it lest he or she takes control of the vehicle remotely to cause an accident. With combined efforts of Uiharu Kazari, Yomikawa Aiho, Sangaku Youko, and Anti-Skill, the disaster was prevented. Misaka Mikoto and Shirai Kuroko would later go on to capture the perpetrator.

First Week of August

 * The Big Spider Arc begins.
 * The Big Spider Arc ends.
 * Big Spider disbands after the capture of Kurozuma Wataru and Hebitani Tsuguo.
 * The Poltergeist Arc begins.

August 8

 * The Deep Blood Arc begins (date based on the Toaru Majutsu no Index light novels).
 * The Roman Catholic Church's Thirteen Knights and its long-range bombardment spell, the Gregorian Chant, are defeated after engaging Aureolus Izzard.

August 9

 * The Deep Blood Arc ends.
 * Aureolus Izzard is declared dead after the events of the arc, but the truth is that he had his memories and appearance changed after his ability to use magic was sealed as a consequence of his defeat.
 * Himegami Aisa acquires the Walking Church cross necklace, sealing her powers.
 * The Poltergeist Arc ends (date based on the Toaru Kagaku no Railgun anime)..
 * Kiyama Harumi's students awaken from their comas.
 * Therestina Kihara Lifeline is taken into custody.

August 10

 * The Sisters Arc (Railgun) begins (date based on the Toaru Kagaku no Railgun manga).

August 20

 * The Sisters Arc (Index) begins.

August 22

 * The Sisters Arc ends.
 * The Level 6 Shift experiment is canceled.

August 24

 * Etzali abducts Unabara Mitsuki, takes Mitsuki's form, and begins stalking Misaka Mikoto, with the objective of taking her form and sowing distrust amongst Kamijou Touma and his peers.

August 27

 * Due to the increased hostilities by delinquents who are looking for prestige and glory via defeating the one who defeated Accelerator, Kamijou Touma is forced to leave Academy City (along with Index) temporarily at the urging of Tsukuyomi Komoe while Academy City quells the situation.
 * Due to the distortion of the elements, Kamijou Touya accidentally triggers Angel Fall through sheer coincidence. As a result, Archangel Gabriel appears on Earth, steals the body of Sasha Kreutzev and assumes the name Misha Kreutzev.
 * Based on the Toaru Kagaku no Railgun manga: Kongou Mitsuko successfully transfers to Tokiwadai Middle School, and ends up lost while trying to find her dormitory. Misaka Mikoto later uses Mitsuko to get away from Unabara Mitsuki (Etzali), who is following her, and later hangs out with her, leaving Mitsuko completely unaware of Mikoto's status as a Level 5 and confused about her apparent popularity.

August 28

 * The Angel Fall Arc begins.
 * Kamijou Touma and Index retreats from Academy City due to increased hostilities around him.

August 30

 * The Angel Fall Arc ends.
 * Kamijou Touma returns to Academy City and is being treated in a certain hospital.

August 31

 * The Three Stories Arc occurs.
 * Etzali betrays Return of the Winged One by deliberately accepting the failure of his mission.
 * Accelerator becomes brain-damaged after being shot in the head by Amai Ao.

September
The month of September currently has the highest rate of countries and states, including Academy City, sending rockets into space. First, this is due to the various states scrambling to obtain the Remnant of Tree Diagram, after the Orihime 1 satellite was destroyed. Second, it is for the Venus Probe Contest, which was used by Academy City as a way to launch materials into space in order to build the part of the Endymion space elevator in secret.

September 1

 * The new school term officially starts in Academy City.
 * The Kazakiri Hyouka Arc occurs.
 * As Sherry Cromwell attacks Academy City, specifically, the School District 7 Underground Shopping Center, to try and stir up a war between magic and science, Kazakiri Hyouka manifests herself.

September 2

 * Chemicaloids Janie and Febrie are taken by a now free Nunotaba Shinobu to an institution outside of Academy City for readjustments.

September 3

 * Misaka Mikoto, Shirai Kuroko, Uiharu Kazari, and Saten Ruiko are randomly selected to take part in Academy City's seven-day exchange program. Here, they are taken to Liberal Arts City, an affiliate of Academy City, and are later involved in a conspiracy involving Aztec magicians.

September 6

 * The Amakusa-Style Remix of Church engage the Agnese Forces in one of its first skirmishes to retain Orsola Aquinas and the purported Book of the Law.

September 8

 * The Orsola Aquinas Rescue Arc begins.

September 9

 * The Orsola Aquinas Rescue Arc ends.
 * The Agnese Forces are used as scapegoats by the Roman Catholic Church. Considered sinners, they are later transferred to the Queen's Fleet for use as a labor force.
 * The Amakusa-Style Remix of Church joins the Anglican Church.
 * Orsola Aquinas joins the Anglican Church.

September 10

 * The plotline of the Toaru Majutsu to Kagaku no Ensemble and Toaru Majutsu no Index: Road to Endymion takes place.

September 12

 * The plotline of the Toaru Majutsu to Kagaku no Ensemble game and Toaru Majutsu no Index: Road to Endymion ends.

September 14

 * The Tree Diagram Remnant Arc begins.

September 15

 * The Tree Diagram Remnant Arc ends.

Third Week of September

 * The plotline of the Toaru Majutsu no Index Movie takes place.
 * Misaka Mikoto attempts to anonymously hack into the esper Bank for unknown reasons, but is foiled by the "Goalkeeper".
 * The Daihasei Festival Arc (Railgun) begins.
 * The Level 5s are contacted about participating in the opening ceremony of the Daihasei Festival. Shokuhou Misaki and Sogiita Gunha accept.

September 19

 * The Daihasei Festival begins.
 * The Daihasei Festival Arc (Index) begins.
 * Misaka 10032 takes the place of Misaka Mikoto in the 'Balloon Hunter' competition against Baba Yoshio's school, where she is discreetly injected with a posoinous nanodevice by Baba, who had mistaken her for Mikoto.
 * Shokuhou Misaki uses her ability to kidnap Misaka 10032 by diverting the ambulance carrying her.
 * The night parade festivities at 6:30 pm block out the starlight necessary for the Croce di Pietro to function correctly, foiling Lidvia Lorenzetti and Oriana Thomson's plans.

September 20

 * The Daihasei Festival Arc (Index) ends.
 * Lidvia Lorenzetti and Oriana Thomson are captured by the Anglican Church.
 * The Croce di Pietro is lost.
 * Shokuhou Misaki erases Shirai Kuroko, Uiharu Kazari and Saten Ruiko's memories of Mikoto.
 * Kihara Gensei links Misaka Mikoto to the Sisters as part of his experiment to make Mikoto a Level 6.
 * The Daihasei Festival Arc (Railgun) ends.

September 25

 * Touma wins a seven-day, five-night trip to Northern Italy.
 * The La Regina del Mare Adriatico Arc begins.
 * The Daihasei Festival concludes.

September 26

 * The La Regina del Mare Adriatico Arc ends.
 * La Regina del Mare Adriatico is destroyed.
 * Biagio Busoni is captured by the Anglican Church.
 * The Agnese Forces join the Anglican Church.
 * The Pope approves the document of investigating Kamijou Touma as an enemy of God.

September 30

 * The Academy City Invasion Arc occurs.
 * Vento of the Front invades Academy City.
 * Kihara Amata is ordered to capture Last Order and inject her with a virus that will allow Fuse=KAZAKIRI to manifest, as a defence against Vento.
 * Accelerator, showing signs of Awakening, kills Kihara Amata, the one who developed Accelerator's abilities, after Amata tampers with Last Order's coding.
 * Academy City reveals its use of an angel.
 * The Roman Catholic Church's magic is revealed but is covered up as an esper development program done by the Church.
 * Accelerator is recruited into working for Academy City.
 * Hostilities between Academy City and the Roman Catholic Church become apparent.

October 3

 * The Skill-Out leader, Komaba Ritoku, kills himself during the assault by GROUP, destroying their plans to cause the downfall of Academy City's communication network, which would in turn allow them to attack target espers.
 * Hamazura Shiage becomes the leader of Komaba Ritoku's Skill-Out gang and fails in his mission to kill Misaka Misuzu, due to the intervention of Kamijou Touma, Unabara Mitsuki (Etzali) and Accelerator.
 * Komaba Ritoku's gang is left leaderless, but Hanzou Hattori decides to assume leadership of the gang.
 * The Russian Orthodox Church, represented by Vasilisa, visits London to have a conference with the Anglican Church regarding the upcoming war between Academy City and the Roman Catholic Church.

First Week of October

 * Protests erupt around the world due to the Document of Constantine, a ploy by God's Right Seat to turn the Russian Orthodox Church to their side.
 * The Document of Constantine Arc occurs.
 * Academy City begins the Interceptor Show.
 * Another riot in Avignon start up.
 * As a sign of strength, Academy City forces France to allow it to invade Avignon in order to catch a religious group violating international law. The invasion forcefully removes the residents of the old city and destroys much of it, including the Palais des Papes.
 * The Russian Orthodox Church allies with the Roman Catholic Church.

First Friday of October

 * Hamazura Shiage begins subordinate work for ITEM.
 * Kuruwa confronts Hattori Hanzou in an attempt revive the Iga ninja clan.

October 9

 * The Battle Royale Arc occurs.
 * Tsuchimikado Motoharu captures Management, a provider for Academy City's dark side.
 * Last Order is discharged from the hospital, and is seen by Uiharu Kazari. Uiharu then accompanies her.
 * Accelerator obtains the blueprints for his choker from Heaven Canceler after putting a gun to his back.
 * Etzali is ambushed by a mercenary group working under BLOCK, but he manages to kill Yamate, an operative of BLOCK, and uses his appearance to infiltrate BLOCK.
 * Before he can be interrogated by GROUP, Management is killed by a boy with goggles, an operative of SCHOOL.
 * Sunazara Chimitsu, a mercenary hired by SCHOOL, attempts to assassinate Oyafune Monaka but fails thanks to Accelerator's intervention.
 * To maintain his cover, Etzali incapacitates Tetsumou, an esper working for BLOCK, by making her lose a few fingers of her right hand and pinning it on a subordinate, which makes Saku Tatsuhiko, the leader of BLOCK, kill the subordinate.
 * SCHOOL, led by Kakine Teitoku, the second Level 5, attacks the particle engineering lab near Kirigaoka Girls' Academy in District 18 to obtain the Tweezers, but ITEM, led by Mugino Shizuri, the fourth Level 5, intercepts SCHOOL. During the battle, Mugino kills the boy with goggles.
 * A girl in a dress, an operative of SCHOOL, pursues ITEM, forcing ITEM to split up. She then attempts to kill Hamazura Shiage but fails.
 * Accelerator is ambushed by Saraku, an esper working for MEMBER, but easily subdues him.
 * Accelerator is tricked into destroying the antenna that communicates with the Hikoboshi II surveillance satellite, rendering the satellite useless.
 * After assembling and equipping the Tweezers, Kakine finds his driver killed by Professor, the leader of MEMBER, and is ambushed. Kakine survives the assault unscathed, and Professor is killed.
 * Finding himself trapped in his underground shelter, Baba Yoshio, an operative of MEMBER, contacts fellow MEMBER operative Xochitl, but she abandons MEMBER.
 * BLOCK attempts to smuggle a force of 5000 mercenaries into Academy City, but thanks to Etzali's intervention, they only manage to get around 100 through, as three Six Wings attack helicopters take out the rest.
 * Etzali and Accelerator each destroy a Six Wings.
 * BLOCK takes over the Reformatory in District 10 in order to take Musujime Awaki's comrades hostage. During the takeover, about 50 of their mercenaries are killed by Xochitl.
 * To protect the hostages, Teshio Megumi, an operative of BLOCK, incapacitates Saku.
 * After overcoming her trauma, Musujime subdues Teshio.
 * Etzali subdues Xochitl. In order to save Xochitl's life, he claims her Aztec grimoire as his own.
 * Shiage is ambushed by three of his former Skill-Out comrades, but Hattori Hanzou helps him escape. Hanzou then gives Shiage a lady's handgun before Shiage regroups with ITEM.
 * ITEM (minus operative Frenda Seivelun) regroups, and decides to locate SCHOOL with Takitsubo Rikou's help, but SCHOOL ambushes ITEM.
 * After presumably killing Sunazara with an explosion, Kinuhata Saiai is subdued by Kakine after learning that Frenda sold out ITEM to SCHOOL.
 * To protect Shiage, Takitsubo battles Kakine, who carried Kinuhata's body with him, but faints due to her inability to control Kakine's AIM field.
 * Shiage decides to come back for Takitsubo, and the girl in the dress regroups with Kakine. After telling Shiage about Takitsubo's condition, Kakine leaves with the girl in the dress.
 * To protect Takitsubo, Shiage takes her with him and abandons ITEM, and finds Yomikawa. He and Takitsubo are then discovered by Mugino, who is revealed to have killed Frenda for her betrayal. Leaving Takitsubo with Yomikawa, he fights Mugino.
 * Shiage presumably kills Mugino by shooting her multiple times. This turn of events defies Aleister Crowley's predictions.
 * Meeting Hanzou again, Shiage tells him that he is leaving Skill-Out.
 * As Uiharu sends Last Order away, she meets Kakine. He then lashes at her, revealing that she sent Last Order away on purpose after sensing his presence. Just as he is about to kill her, Accelerator saves her.
 * After a battle in which he protects the civilians in the vicinity from Kakine's assault, Accelerator defeats Kakine.
 * As Accelerator is about to kill Kakine, Yomikawa convinces him to stop. Kakine takes the chance to critically injure her.
 * Awakening for the second time, Accelerator kills Kakine brutally and goes berserk. Anti-Skill is about to take him down, but Last Order finds him, and manages to calm him down. In the confusion, Tsuchimikado recovers the Tweezers.
 * GROUP accesses the UNDER_LINE network, and discovers the existence of DRAGON.

October 10

 * A few scenes from the British Royal Family Arc occurs

Mid-October

 * The Acqua of the Back Arc occurs
 * Fiamma of the Right destroys St. Peter's Basilica and heavily injures Pope Matthai Reese. Fiamma would later gain almost complete control of Roman Catholic and Russian Orthodox forces.

Second Friday of October

 * Academy CIty sends the MISAKA clones to capture the Gemstones spread around the world
 * Ollerus invades Academy City and easily defeats Sogiita Gunha to make a point to Aleister not to mistreat the gemstones.
 * Misaka Tabigake warns Aleister by cell phone not to mess with his daughter.

October 15

 * The Eurotunnel bombing occurs, stressing both the United Kingdom and France's economies.

October 17

 * The British Royal Family Arc occurs in earnest.
 * The Sky Bus 365 terrorist incident occurs.
 * The Knights of England, in alliance with the second Princess Carissa, performs a coup in order to usurp Queen Elizard from the throne and establish Carissa as the ruler of the United Kingdom of Great Britain and Northern Ireland, starting the British Halloween.
 * France is threatened under Carissa's coup.
 * The DRAGON Arc occurs.

October 18

 * The British Royal Family Arc ends.
 * Carissa's coup is crushed, Curtana Original is destroyed, Buckingham Palace is razed, and Fiamma of the Right steals Index's John's Pen remote control from its ruins.
 * Nikola Tolstoy takes control of the Russian Orthodox Church.
 * Russia attacks the Elizalina Alliance of Independent Nations.
 * Russia sends an ultimatum to Academy City demanding it to halt all projects and pursuits it is undertaking under 24 hours or Russia will declare war.

October 19

 * Academy City rejects Russia's terms, forcing Russia make a Proclamation of War against Academy City and its allied forces, officially starting World War III.

October 30

 * World War III ends with the Proclamation of Armistice by Russia and its allied forces.
 * The World War III Arc ends.
 * Kamijou Touma is presumed dead after falling into the Arctic Ocean during the events of World War III.
 * The Church of England discovers Aleister Crowley to be alive.

November 5

 * Freshmen Arc occurs.
 * The group Freshmen starts an operation that has the objective of having the Academy City Board of Directors label Hamazura Shiage and Accelerator as "too dangerous to be left alone". The operation succeeds, but it causes the downfall of Freshmen as the people involved are defeated by the counterattack of their targets.
 * Kamijou Touma returns to Academy City with the help of Leivinia Birdway and her magic cabal.
 * Homecoming Arc occurs.
 * Kamijou Touma, Accelerator, and Hamazura Shiage work together to prevent a floating landmass, referred to as Radiosonde Castle by Necessarius, from falling onto Academy City.

November 10

 * Hawaii Invasion Arc occurs.
 * Leivinia Birdway has members of the Kamijou Faction confront GREMLIN in Hawaii, in a gambit to strike the core of Academy City, and bring out GREMLIN out in the open at the same time. Trident and GREMLIN join forces, under the control of Olay Blueshake and Saronia A. Irivika, to invade Hawaii as a starting point to turn the United States of America into a theocracy.
 * The private military company, Trident, manages to agree with the terms of their surrender, proposed by Roberto Katze, to the United States of America.
 * Kilauea erupts, sending volcanic ash into the atmosphere.
 * 27 Academy City Cooperative Institutions withdraw their cooperation with Academy City after the events of the invasion, and the subsequent discovery of Academy City agents (Touma and company) meddling in international affairs. Natural Selector, a tournament dedicated to finding a new global standard to replace the espers of Academy City, is announced shortly after. Baggage City is also purchased by the institutions.

November 13

 * Baggage City Arc occurs.
 * The Natural Selector tournament is started by Science Guardian, formerly known as the 27 Cooperative Insitutions of Academy City, and is held in Baggage City amidst millions of spectators and countless competitors.
 * A bloody supression by Academy City is inflicted upon the city, ending the tournament, and later, despite the combined efforts of Baggage City and GREMLIN, Science Guardian acquiesces to Academy City's demands.

Mid-November

 * Ichihanaran Festival Arc begins.
 * Kamijou Touma and Thor attack the Windowless Building.
 * Fräulein Kreutune escapes the Windowless Building. Academy City goes into Code Red.
 * Ichihanaransai occurs.
 * Ichihanaran Festival Arc ends.
 * The flesh and blood organs of the original Kakine Teitoku is stolen by Ollerus, and taken away from Academy City.
 * Fräulein Kreutune becomes free from its function and becomes incapable of eclosing into a threat to Aleister Crowley's plans.
 * Agitate Halation Arc begins
 * Matsusada, a famous authority in fluid mechanics, tries to leave Academy City illegally, but is captured in School District 23 though becomes unconscious after ingesting cp-191.
 * Academy City Board of Directors member Kaizumi Tsugutoshi is injured after an attack on his building by Tsuchimikado Motoharu.
 * Academy City Board of Directors member Yakumi Hisako "dies" after man-eating cockroaches consume her entire body.
 * A riot of people referring to themselves as "heroes" occur in Learning Core. In a rare event, all seven Level 5 espers of Academy City arrive in the facility as well, defeating several of them.
 * Agitate Halation Arc ends the next day.

Late-November

 * Magic God Othinus Arc occurs.
 * A secret meeting between various heads of state and leaders is held in New York to find an answer to the GREMLIN problem.
 * GREMLIN invades Tokyo
 * Due to the ineffectual handling of the situation by the Japanese goverment, the Anti-GREMLIN Alliance and Academy City separately deal with GREMLIN on their own.
 * Othinus completes Gungnir and recreates the world. The world later passes by an unknown number of Phases before she later concedes the world to Touma and returns it back to normal.
 * A manhunt for Othinus and Kamijou Touma is conducted by several different parties (including GREMLIN) in the aftermath of Othinus returning the world back to normal, and Touma deciding to protect her. None of the parties successfully eliminate either Othinus and Touma.
 * The leaders in the international coalition later give a speech to their constituents urging them not not given into the fear and hatred of Othinus. President Roberto Katze, in particular, broadcasts the footage of Touma's battle with Othinus in his attempts to stop her from killing herself during the speech.
 * Aleister Crowley visits a layer of the world where even Othinus' power couldn't reach and finds the Magic Gods stuck in there, then attacks them.
 * Mental Out Arc occurs.
 * Kihara Noukan completes the cleanup of those who become insubordinate to Aleister Crowley, now badly injured after his fight with the Magic Gods, during his long absence and returns full control of Academy City to him.

December 1

 * St. Germain enters Academy City and traps people inside the Dianoid. The collective identity is later beaten by efforts of Kanou Shinka with the help of Kamijou Touma, Hamazura Shiage, and their respective group of friends, finally freeing the people trapped there.
 * Magic Gods Nephthys, High Priest, and Niang-Niang deliberately weaken themselves to descend upon the world and enter Academy City to deal with Kamijou Touma. After meandering a bit during St. Germain's attack on the Dianoid, they are later struck a blow by Aleister who exploits the spell they used to enter the world.

Trivia

 * It is unclear in which year the series is taking place in. There are some hints that it is in the first decades of the 21st century, as evinced by 1700 years having passed since the rule of Constantine the Great in the 4th century, and Aleister Crowley being said to have died more than 60 years ago in 1947. The global population is also said to be of 6 billions (and in later volumes, 6 or 7 billions), as was the case from 1999 to 2012, but the Catholic population is of 3 billion adherents and the British population of 90 millions (as opposed to 1.2 billion members and ≈ 60 million British respectively). Furthermore, the year has been stated to have the third Friday of March as March 15 and five Fridays in September, which should technically be impossible. Regardless, one should keep in mind that the Toaru Majutsu no Index universe is an alternate universe.