<p>If you are wondering about the episode order:</p>

<p>The broadcasted <em>Accelerator</em> S1 arc happens after <em>Index</em> S1, episode 17 and <em>Railgun S</em>, episode 24. </p>

<p>Which means the <em>Accelerator</em> S1 happens before <em>Index</em> S1, episode 18 and <em>Index</em> S2, episode 1, and <em>Index</em> S1 episodes 19-24, and <em>Index</em> S2, episodes 2-5.</p>

<p><em>Index</em> S2, episodes 2-5, happens before <em>A Certain Magical and Scientific Ensemble</em>, which happens before the <em>Index</em> S2, episodes 6-7, which happens before the Index <em>Miracle of Endymion</em> movie, which happens before <em>Index</em> S2 episodes 8-24, and <em>Index</em> S3.</p>

CC BY-SA 4.0
2019-10-17T21:48:31.060Z
So Accelerator happens between index 1 episodes 17 and 18? Like all of it? This timeline gets confusing
Himitsu_no_Yami
CC BY-SA 4.0
2019-10-17T21:50:15.800Z
A lot of things happen in parallel. Time is also skipped, so it doesn't go day by day (between arcs).
кяαzєя
CC BY-SA 4.0
2019-10-17T21:52:21.880Z
Thanks a bunch for this. Can you explain how you narrowed it down? I don't remember anything that gave away the timeline
Himitsu_no_Yami
CC BY-SA 4.0
2019-10-17T21:56:58.343Z
You have to look through the anime chronology. The dates are mentioned in some episodes (and/or can be cross-referenced with the novel) and progress accordingly with the story arc. https://toarumajutsunoindex.fandom.com/wiki/Anime_Timeline
кяαzєя
CC BY-SA 4.0
2019-10-17T21:45:45.910Z
2019-10-17T21:51:01.937Z
2019-10-17T21:51:01.937Z
кяαzєя
<p>Where exactly does A Certain Scientific Accelerator take place in the timeline? I know it'd some time after Accelerator's gunshot wound by the necklace but that's about it.</p>

<a-certain-magical-index><a-certain-scientific-railgun><a-certain-scientific-accelerator>
Where exactly does A Certain Scientific Accelerator fit in the timeline?
# Where exactly does A Certain Scientific Accelerator fit in the timeline?
Posted by: username_0 on 2019-10-14
Where exactly does A Certain Scientific Accelerator take place in the timeline? I know it'd some time after Accelerator's gunshot wound by the necklace but that's about it.
**Tags:** a-certain-magical-index a-certain-scientific-railgun a-certain-scientific-accelerator
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## 1 answers
### Answer by username_1 on 2019-10-17. Score: 2 | Accepted answer
If you are wondering about the episode order:

The broadcasted *Accelerator* S1 arc happens after *Index* S1, episode 17 and *Railgun S*, episode 24.

Which means the *Accelerator* S1 happens before *Index* S1, episode 18 and *Index* S2, episode 1, and *Index* S1 episodes 19-24, and *Index* S2, episodes 2-5.

*Index* S2, episodes 2-5, happens before *A Certain Magical and Scientific Ensemble*, which happens before the *Index* S2, episodes 6-7, which happens before the Index *Miracle of Endymion* movie, which happens before *Index* S2 episodes 8-24, and *Index* S3.
> **Comments:**
> **username_0** (2019-10-17): So Accelerator happens between index 1 episodes 17 and 18? Like all of it? This timeline gets confusing  
> **username_1** (2019-10-17): A lot of things happen in parallel. Time is also skipped, so it doesn't go day by day (between arcs).  
> **username_0** (2019-10-17): Thanks a bunch for this. Can you explain how you narrowed it down? I don't remember anything that gave away the timeline  
> **username_1** (2019-10-17): You have to look through the anime chronology. The dates are mentioned in some episodes (and/or can be cross-referenced with the novel) and progress accordingly with the story arc. https://toarumajutsunoindex.fandom.com/wiki/Anime_Timeline  
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