Anime Timeline

The Anime Timeline attempts to reconcile the strange time set-up by the anime adaptation of the Toaru Majutsu no Index universe. Having events widely different from the novels, the anime exists as its own universe separate from the novels and manga, though that doesn't mean elements and characters cannot be reused in their parent mediums, as Toaru Majutsu no Index universe is extremely dynamic to changes. Different from the Unified Story Timeline, the complete Anime Timeline does not list dates unless specifically stated in the show itself. Past events are mentioned only in the episode they appear in and will not have its own section if the date is listed. Because of this, some events, especially those that are outside of the episode order, are simply conjectures on which position of the timeline they are. Audio dramas and videogames are not included, but the Toaru Majutsu to Kagaku no Ensemble which is connected with the animated universe, specifically that of the Toaru Majutsu no Index Movie is included, as its place and canonicity in the universe is concretely given.

This timeline can also be viewed as a guide on how to view the anime adaptation in a chronological manner, however first time watchers should consider watching in broadcast order instead. As mentioned above, the anime timeline can get murky, and some episodes can be considered unnecessary and/or redundant. This makes the viewing experience for viewers unfamiliar with the universe confusing, as some arcs in Railgun will assume that you have knowledge established in previously released arcs in Index I, II, or III.

Level Upper Arc

 * – Electromaster
 * Events occur only in one day.
 * – When You Work Under the Sun, You Need to Stay Hydrated
 * An entire week has passed since the events of episode 1.
 * An entire month has passed since Shirai Kuroko and Misaka Mikoto met.
 * Events occur in two days.
 * – Tokiwadai is Targeted
 * – Urban Legends
 * Events seem to occur in two days
 * At least a week has passed since the previous episode.
 * – A Certain Pair of New Trainees
 * Flashback episode. Frame story seem to occur only in a single episode.
 * A year has passed back in autumn when Kuroko and Kazari met.
 * – Everyone is Proactive When it Comes to Such Things
 * Main episode content seem to occur in the span of a single day.
 * – Abilities and Power
 * Events seem to jump in one point in time to another.
 * – Level Upper
 * Most of the story occurs in the same day. Epilogue occurs the next day.
 * Academy City experiences its first apparent power outage during the summer.
 * – Majority Report
 * Events occur in two days.
 * – Silent Majority
 * Events occur over five days. The first day has Saten Ruiko and friends experiment with their powers (Akemi states that before using Level Upper, she could only levitate a paper cup, and now she's lifting her friend, Muu, high in the air). At the 8-minute mark of the episode, Akemi levitates a cleaning robot and says, "I can do this after only 5 days of practicing," and then she suddenly collapses. Kuroko suffers multiple minor injuries from all of the Level Upper user-related incidents she investigates (presumably spread out over this five-day period). Ruiko loses consciousness soon after Akemi does. Moreover, all non-flashback related events occur in that fifth day.
 * – Ms. Kiyama
 * – AIM Burst
 * – A Bikini Divides the Eyeline Between Top and Bottom, but a One-Piece Shows Off the Figure so They Only Flatter the Slender
 * Seem to occur in a single day.
 * Events of Toaru Kagaku no Railgun Episode 13' seem to occur during this episode.
 * Kamijou Touma still retains his memory of Misaka Mikoto.
 * – Special Workshop
 * A holiday. Events occur in only a single day.

Toaru Kagaku no Railgun OVA

 * – Because Misaka-san is Now the Center of Attention
 * Spans an unknown number of days.

Index Arc

 * – Academy City
 * Events occur in two days. Beginning with Touma meeting Mikoto in A Certain Iron Railway Bridge, and the 2nd power outage Academy City experiences in the summer. Second is the start of summer break, and Touma meets Index.
 * Touma states that the 1st day is July 19
 * – Innocentius
 * Events in the night occur during the second day of last episode.
 * – Necessarius
 * Continues events from the second day of the first episode. A new day begins after Index is healed.
 * – Perfect Memorization
 * Day continues from the previous episode.
 * After Touma wakes up from being beaten by Kanzaki Kaori, three days have passed.
 * – Limit
 * Events continue from the current day of episode 4.
 * – Imagine Breaker
 * Most of the events continue from the day of the previous episode, and ends the very next day.
 * An unknown number of days have passed when Stiyl Magnus visits Aleister Crowley.

Big Spider Arc

 * – Skill-Out
 * Events occur in three days.
 * – Academy City
 * Day continues from the last day of the previous episode. According to Kurozuma Wataru, it has been half a year since his release.
 * Second day has the gang visit Konori Mii's dormitory. Mii relates on how it was two years ago when he was presumably killed in a gang war.
 * Third day has Anti-Skill weed out the Skill-Out problem in the Strange, and Kurozuma Wataru and Hebitani Tsuguo is arrested.

Deep Blood Arc

 * – Cult of Science
 * Occurs two weeks since the end of the Index Arc.
 * Only one day has passed from this episode until the end of episode 9.
 * – Ars Magna
 * – Deep Blood
 * Day continues from episode 7. Touma receives the report from Stiyl the next day.
 * Himegami Aisa receives the Walking Church cross necklace to seal her powers, most likely during the day of her visit to Touma's room.

Poltergeist Arc

 * – Tsuzuri's Summer Vacation
 * Events occur in a span of five days.
 * Fourth day indicates that this story coincides with Toaru Majutsu no Index Episode 07 with Himegami Aisa attempting to order "all" the hamburgers.
 * Fourth day confirms the passing of the Deep Blood Arc with Himegami Aisa wearing the Walking Church.
 * – Asunaro Park
 * Prologue occurs during the night, one day,
 * Most of the main story most likely occur in three days.
 * – Midsummer Fesitval
 * Occurs in only one day.
 * Confirms the passing of the Index Arc with Touma unable to recognize Mikoto and the second appearance of Index since episode 17.
 * – Poltergeist
 * Prologue occurs during the night, and transitions to Kazari and her teacher's meeting the next day.
 * The next day, Haruue Erii arrives and moves into the Uiharu Residence, and Kuroko and Kazari goes to a conference regarding Poltergeist. Later that night, they go to the festival.
 * – Voice
 * Starting off from the festival last episode, two days pass by during this episode.
 * – Level 6
 * Starting off from the last day from the previous episode, two days pass by during this episode.
 * – What Do You See in Your Eyes Right Now?
 * Events of this episode, and most of the next episode occur in only one day.
 * – Dear my Friends
 * Continuing the day from the last episode, most of the episodes events occur in only one day.
 * An unknown number of days have passed from the main story to the epilogue.
 * August 9 is date of the epilogue.

Sisters Arc
 Sisters Arc
 * An Unknown number of days have passed since August 10.

Silent Party Arc and Angel Fall Arc
 Silent Party Arc and Angel Fall Arc
 * Other than the epilogue of the final episode of the Silent Party arc, which occur sometime in September 2, the entire arc occurs in a span of 7 days. As for the Angel Fall Arc, the actual events of the arc not including the flashbacks or references to events before the beginning of the first episode of the arc occur in under four days.

Three Stories Arc

 * All episodes occur in a single day, August 31.
 * – Replica
 * – The Last Day
 * The epilogue of Kanzaki Kaori attacking the Knights of England seem to occur in a different time.
 * – Last Order
 * – Virus Code

Kazakiri Hyouka Arc

 * All episodes occur in a single day, September 1.
 * – Counter Stop
 * – Golem
 * – Friend
 * – Imaginary Number District - Five Elements Institution

Necromancer Arc

 * Between September 1st and September 14th, the events of the Necromancer Arc occur.
 * – Accelerator
 * Anime exclusive episode
 * – Necromancer
 * – Numbers
 * – Third Number
 * – DA
 * – Scavenger
 * – Download
 * – Friend
 * – Memory of Death
 * – Catastrophe
 * – Perfect Golem
 * – Something to Protect

Orsola Aquinas Rescue Arc

 * All of the events of the arc barring the prologue, occurs in only a single day, September 8. The epilogue with Touma in the hospital occurs September 9.
 * – Book of the Law
 * – Amakusa Style
 * – Sheol Fear
 * – Lotus Wand

Toaru Majutsu to Kagaku no Ensemble

 * Toaru Majutsu to Kagaku no Ensemble
 * Storyline of the videogame occurs from September 10 to 12.

Tree Diagram Remnant Arc

 * All of the events of the arc occur in only a single day, September 14. The epilogue with Touma in the hospital occurs the next day.
 * – Remnant
 * – Move Point

Toaru Majutsu no Index Movie

 * Toaru Majutsu no Index Movie – Miracle of Endymion
 * Barring the epilogue, the events in the movie occur in a period of 6 days.

Daihasei Festival Arc

 * – Level 5 (occurs over 3 days of time, after the Tree Diagram Remnant Arc but before the arc-proper)
 * Episodes 8-13 of Index II and episodes 2, 3, and the first half of 4 of Railgun T occur on the single day of September 19.
 * – Daihasei Festival, – Daihasei Festival
 * – Route Disturb
 * – Shorthand, – Balloon Hunter
 * – Stab Sword
 * – Belvedere
 * – Croce di Pietro
 * The epilogue of Index II episode 13 with Himegami Aisa occurs on September 20.
 * – Alteration
 * The second half of episode 4, episodes 5-13 and the first half of 14 of Railgun T occur on September 20.
 * – Trust
 * – The Battle Begins
 * – Auribus oculi fideliores sunt.
 * – Railgun x Mental Out
 * – Kouzaku Mitori
 * – Clone Dolly
 * – Joining the Battle
 * – Exterior
 * – SYSTEM
 * – Dragon Strike
 * The second half of episode 14 occurs on three separate days, the epilogue with the folk dance occurs on the latter day, September 25
 * – Promise

La Regina del Mare Adriatico Arc

 * Prologue of the arc occurs on the last day of Daihaseisai, September 25. The rest of the arc occurs in the span of a single day, September 27.
 * – City of Water
 * – The Queen's Fleet
 * – Rosary of the Appointed Time

Dream Ranker Arc

 * – Dream Ranker
 * The first part of the first half of the episode occurs on September 26th, probably in the afternoon due to events of Episode 15, which occurred on the same day. The second part of the first half and the second half of Episode 16 occur on September 27th
 * - Precognition
 * During the work of Kuroko the episode mentions incidents of people in a coma being this the consequence of the attack of Vento of the Front in the Academy City Invasion arc.
 * - Bust Upper
 * Hamazura Shiage working for ITEM states that this episode is taking place after the Skill Out Uprising Arc.
 * - Strange Coincidence

Academy City Invasion Arc

 * The entirety of the arc occurs in the span of a single day, September 30.
 * – Penalty Game
 * – Serial Number
 * – Researcher
 * – Hound Dog
 * – Testament
 * – Divine Punishment
 * – Before the Outbreak of War
 * Only the scenes before Touma goes to school are included for this episode, as the rest of the episode occurs in a later date.

Skill-Out Uprising

 * – Before the Outbreak of War
 * Starts during the scene with Touma's school. From that point all events afterwards including the next episode occurs in a single day, October 3.
 * – Skill-Out

Document of Constantine Arc

 * The entirety of the arc occurs in the span of a single day in the first week of October.
 * – Chaos
 * – God's Right Seat
 * – C-Document

Battle Royale Arc

 * The entirety of the arc occurs in the span of a single day, October 9.
 * – The Dark Side of Academy City
 * – Dark Matter
 * – Person with Super Powers

Acqua of the Back Arc

 * The entirety of the arc occurs in the span of a single day, mid-October.
 * – The Third Level
 * – Saint Destroyer
 * – Divine Mother Worship

British Royal Family Arc

 * – Sky Bus 365
 * – British Labyrinth
 * – Mercenary
 * – Curtana Original
 * – Heroes

DRAGON Arc

 * – Spark Signal
 * – Board of Directors
 * – DRAGON

World War III Arc

 * – Alliance of Independent Nations
 * – Misaka Worst
 * – A Reason to Protect
 * – Star of Bethlehem
 * – Gabriel
 * – Fuse Kazakiri
 * – Index
 * – Wings
 * – Son of God