(Updated) Rick Riordan Mythology Timeline


A shared universe is always the best way to tell stories. It ties together different series even if they will never cross each other’s paths. It makes the reader’s imagination soar like an eagle wanting to see the bigger picture and understand how it all interconnects. How one story affects the other. How decisions of the characters makes an impact elsewhere.

But the challenge in this is keeping track of the events in each story. There will always be inconsistencies. It is unavoidable. Still, it needs to make sense, right? As a fan of Rick Riordan‘s Mythology, I went to work to create a timeline of events.

Here’s the result of that work.

When plotting timelines for works of fiction that you did not write, the first thing to find is an anchor. Usually, it is the canon publications, or the main series. In Rick Riordan’s Mythology, these are the novels. Any other publications like short stories must fit the novels and not the other way around.

This will solve inconsistencies if there are any (and there will be). This showed up in the Percy-Kane crossover shorts. If we use the Percy-Kane crossover as our anchor, the events in “The Serpent’s Shadow” no longer fits. It introduces more inconsistencies than it solves. But if we stick with the novels as our anchor, the inconsistencies are minor.

Hence the importance of finding an anchor and sticking to it. In this case, the novels is our anchor. If a non-novel contradicts the novel, we find ways around it, in-universe (or in-character) as much as possible. If there is no possible way to solve the inconsistency, we are left with two options: [1] it’s an in-universe mystery; or [2] author’s mistake. I do not like the last option “author’s mistake” because a fiction will always be a fiction, no matter how close it is to reality or not. In the first place, how are we to know if it was not a deliberate inconsistency?

I will not go into the methodology of how to properly pinpoint the dates. There are many considerations and factors involved, and I think it’s best to have it in another post (if I get a lot of request for an explanation).

In short, you can trust that the timeline below was based on an independent and extensive research.

Update 2015-10-29

With the release of The Sword of Summer, the first novel in the new series Magnus Chase and the Gods of Asgard, a new anchor has been set, this very book. There were numerous clues that were left and these left no room to move the year of this novel forward or backward, not even a single year. The Sword of Summer was definitely set on January 2014.

Clues and all, it also affected all the previous novels, as such, they all have to be moved forward to match the clues dropped in The Sword of Summer. Fair enough, because it solved more inconsistencies and only left us with a new one (or two but they’re of the same type of inconsistency).

Here is the new timeline and years.

Read it completely first because I included explanations to the dates chosen.

Timeline of Events

Color Legend

  • Magenta: Camp Half-Blood series
  • Green: Kane Chronicles series
  • Blue: The Nine Worlds series
  • Gold: Overlap
  • 1998-01-06 Tue: Magnus Chase was born
  • 1998-07-12 Sun: Annabeth Chase was born
  • 1998-08-18 Tue: Percy Jackson was born
  • 1999-06-23 Wed*: Carter Kane was born
  • 2001-03-17 Sat: Sadie Kane was born
  • 2004-07-12 Mon: Annabeth’s 6th birthday
  • 2004-11-25 Thu: The Sword of Summer (Novel)
    • Chase family-clan thanksgiving at their Uncle Randolph’s town house
    • Magnus and Annabeth were playing
    • “Great Thanksgiving Schism”
    • Magnus mentioned that Annabeth was a “first grader”. She was 6 years old, and Magnus was 2 months shy to 7
  • 2005-01-06 Thu: Magnus’s 7th birthday
  • 2005-07-12 Tue: Annabeth’s 7th birthday
  • 2005-07-?? ???
    • The Lost Hero (Novel): Annabeth ran away from home when she was 7.
    • The Lightning Thief (Novel): She told Percy that her mother guided her to find Thalia and Luke when she was 7
    • The Diary of Luke Castellan (Short Story): Then was found by Luke and Thalia
  • 2010-06-11 Fri: Start of “The Lightning Thief” (Novel)
  • 2010-06-21 Mon: Summer Solstice
    • Quest deadline
    • Percy returned to Camp Half-Blood a hero
  • 2010-06-23 Wed*: Carter’s 11th birthday
  • 2010-06-28 Mon: Percy’s mother’s letter arrived a week after he got back to camp
  • 2010-07-04 Sun: Grover started his search for Pan
  • 2010-07-12 Mon: Annabeth’s 12th birthday
  • 2010-08-04 Wed*: Camp Half-Blood summer camp festivities
  • 2010-08-05 Thu*: End of “The Lightning Thief” (Novel)
  • 2010-08-18 Wed: Percy’s 12th birthday
  • 2010-09-22 Wed*: Percy Jackson and the Stolen Chariot (Short Story)
    • Fall Equinox
  • 2011-06-08 Wed: Start of “The Sea of Monsters” (Novel)
  • 2011-06-18 Sat: End of “The Sea of Monsters” (Novel)
  • 2011-06-30 Thu: Percy Jackson and the Bronze Dragon (Short Story)
    • The Hephæstus Bronze Dragon was found and activated
    • Annabeth asked Percy to be with her on the “biggest dating event of the summer”
    • Charlie/Charles Beckendorf and Silena Beauregard started dating
  • 2011-07-04 Mon: Percy Jackson and the Bronze Dragon (Short Story)
    • Percy-Annabeth’s first (courtship) date
  • 2012-??-?? ???: The Sword of Summer (Novel)
    • Magnus Chase’s mother was killed
    • Sam became a Valkyrie of Odin
  • 2012-12-16 Sun: Start of “The Titan’s Curse” (Novel)
  • 2012-12-21 Fri: End of “The Titan’s Curse” (Novel)
    • Winter Solstice
  • 2013-06-02 Sun: Start of “The Battle of the Labyrinth” (Novel)
  • 2013-06-21 Fri 05:04 UTC: Summer Solstice
  • 2013-06-23 Sun*: Carter’s 14th birthday
  • 2013-07-02 Tue: End of “The Battle of the Labyrinth” (Novel)
  • 2013-08-18 Sun: Percy’s 15th birthday
    • The Battle of the Labyrinth (Novel)
  • 2013-12-24 Tue: Start of “The Red Pyramid” (Novel)
  • 2013-12-25 Wed: Percy Jackson and the Sword of Hades (Short Story)
  • 2013-12-29 Sun: End of “The Red Pyramid” (Novel)
  • 2014-01-06 Mon: Start of “The Sword of Summer” (Novel)
    • Annabeth and her father went to Boston to look for Magnus
    • Magnus’s 16th birthday
  • 2014-01-08 Wed: Magnus and Annabeth met at Magnus’s funeral
  • 2014-01-09 Thu: Magnus Chase met his Aunt Freya
  • 2014-01-14 Tue: Eve of the Full Moon
    • Thor mentioned Arrow and the League of Assassins
      • First season aired on 4Q 2012
      • LoA first appeared in season 2 (premier: 2013 October)
    • Since this is the case, there is no other option but to assume the following:
      • 2014-01-06 Mon: Is Magnus Chase’s actual 16th birthday
      • 2014-01-15 Wed: Is the correct date for Ragnarok because it’s Full Moon on that day
      • Astronomical events are important in mythology, especially in this case
      • Knowing Greek/Roman half-bloods and Egypt avatars, it’s very possible Asgard half-bloods have quirkiness too. (In-universe explanation.)
    • Or, you can follow the novel…
      • 2014-01-22 Wed: Is Ragnarok day, this is the only year when January 22nd fell on Wednesday. The other years are too far in the past or future.
      • There were two Full Moons. The secular astronomical Full Moon on the 15th, and the Valhalla-mystical Full Moon on the 22nd. At least this way, we are still explaining it “in-universe”.
      • Or, the Full Moon date on the 22nd was a literary miscalculation. Meaning, when the author was looking at the calendar, he mistook the week of Full Moon as the week of 22nd. These two dates are exactly 1 week apart. (Pure out-of-universe explanation, which I don’t like.)
    • Full Moon and New Moon dates per year:
      • 2015-01-20 08:13 EST: New Moon
      • 2014-01-15 23:52 EST: Full Moon
      • 2013-01-26 23:38 EST: Full Moon
      • 2012-01-23 02:39 EST: New Moon
      • 2011-01-19 16:21 EST: Full Moon
      • 2008-01-22 08:34 EST: Full Moon
  • 2014-01-15 Wed: End of “The Sword of Summer” (Novel)
    • Quest deadline
    • Full Moon: 23:52 EST (Boston)
  • 2014-03-16 Sun: Start of “The Throne of Fire” (Novel)
  • 2014-03-17 Mon: Sadie’s 13th birthday (hinted that it was on a Monday)
  • 2014-03-19 Wed
    • Bast: The equinox begins tomorrow at sunset.
    • Bast: The following dawn, the morning of March twenty-first, Apophis intends to rise from the Duat.
  • 2014-03-20 Thu
    • Spring Equinox: 16:57 UTC
    • Quest deadline
  • 2014-03-21 Fri: End of “The Throne of Fire” (Novel)
    • Sadie found out Carter’s secret name
  • 2014-08-11 Mon: Start of “The Last Olympian” (Novel)
  • 2014-08-18 Mon: End of “The Last Olympian” (Novel); Son of Magic (Short Story)
    • Percy-Annabeth started dating (boyfriend-girlfriend)
    • Percy’s 16th birthday
    • Luke died as a hero
    • Son of Magic (short story): Alabaster was banished from the Olympian family
  • 2014-09-?? ???: The Son of Neptune (Novel)
    • Hazel Levesque was rescued by nico de Angelo from the Fields of Asphodel
  • 2014-09-18 Thu
    • Percy Jackson and the Staff of Hermes (Short Story) EDT: Percy-Annabeth’s 1st monthsary
    • Start of “The Serpent’s Shadowa” (Novel) CDT/Dallas
      • New Moon does not fit
      • We can not set this to 2009 (best fit) without moving CHB back as well
      • If we do, the Kane siblings will be older than Percy and Annabeth by a few years
    • The other attacks all happened on the night of the new moon, when darkness is greatest. Believe me, he’ll hit your museum tonight. And he’ll hit it hard.
      • If we set it to New Moon on 2009-09-18 13:00 Dallas time, it fits perfectly with the novel
      • But if we set it to New Moon on 2014-09-24 01:13 CDT, then the attack happened after the Fall Equinox on 2014-09-23. It’s not possible
  • 2014-09-19 Fri 19:00 EDT/Brooklyn: The Serpent’s Shadow (Novel)
    • Drew Tanaka and Lacy studies at the Brooklyn Academy for the Gifted (both children of Aphrodite)
    • Lacy has a crush on Carter Kane
    • Lacy is a year younger than Sadie Kane (Lacy is 12 years old)
    • Sadie Kane studies at the Brooklyn Academy for the Gifted
    • Sadie and Drew Tanaka hate each other
  • 2014-09-20 Sat: The Serpent’s Shadow (Novel)
    • Sadie and Leonid portaled from Brooklyn to Cairo
    • Egypt is ahead by 7 hours from Brooklyn
    • Meeting at First Nome
    • (Speaking from Egypt)

      “They will attack in three days,” Leonis said. “At the same time, Apophis will rise — at dawn on the autumn equinox.”

    • Setne’s trial in-front of Osiris
  • 2014-09-23 Tue 05:29 Egypt: End of “The Serpent’s Shadow” (Novel)
    • Fall Equinox: 05:29 Egypt
    • Deadline of Quest
  • 2014-12-09 Tue: The Lost Hero (Novel)
    • Percy and Annabeth met at the camp (early Winter break)
    • They supposedly have 3 months together (ie Winter break)
  • 2014-12-14 Sun: The Lost Hero (Novel)
    • Percy and Jason were abducted by Hera/Juno
    • Early in the morning, Percy was discovered missing
    • Piper’s dream and threat from a Giant
  • 2014-12-17 Wed: Start of “The Lost Hero” (Novel)
    • Jason appeared in the bus, the field-trip incident, between 8:00 and 10:00 in the morning
    • Jason, from Camp Jupiter, arrived at Camp Half-Blood without memories
    • Piper and Leo arrived at Camp Half-Blood
    • Annabeth’s calculation: Search = 6 hours and 12 minutes. So they arrived at the Camp sometime between 10:00 and 12:00nn
    • Juno (Hera) talked to Jason, afternoon
    • Hera (Juno) talked to Piper, afternoon
    • Dinner (which Piper missed)
    • Campfire and Quest announcement
  • 2014-12-21 Sun: End of “The Lost Hero” (Novel)
    • Winter Solstice: 18:03 EST
    • Quest deadline at sunset
  • 2014-12-24 Wed*: Leo Valdez and the Quest for Buford (Short Story)
  • 2014-12-31 Wed*: The Son of Neptune (Novel)
    • Thanatos, god of death, was abducted in Alaska
  • 2015-03-20 Fri*: Son of Magic (Short Story)
    • Spring Equinox: 18:55 EDT
  • 2015-05-?? ???: The Mark of Athena (Novel)
    • Annabeth received her quest from Minerva (Athena’s Roman aspect)
  • 2015-06-23 Tue*: Carter’s 16th birthday
  • 2015-06-?? ???: The Son of Neptune (Novel)
    • Percy woke up at the Wolf House, home of the wolf goddess Lupa
  • 2015-06-19 Fri: Start of “The Son of Neptune” (Novel)
    • Reyna, the Prætor of Camp Jupiter, confirmed that she and her sister Bellona (the Amazon Queen) first met Percy and Annabeth four years ago in a spa. This was during “The Sea of Monsters” (Novel), four years ago.
  • 2015-06-21 Sun 9:38 PDT: Summer Solstice
    • Deadline of Percy’s quest
  • 2015-06-24 Wed: End of “The Son of Neptune” (Novel)
    • Percy received Leo’s message about the arrival of Argo II
  • 2015-06-25 Thu: Start of “The Mark of Athena” (Novel)
    • Argo II arrived at Camp Jupiter
  • 2015-07-01 Wed
  • 2015-07-12 Sun: Annabeth’s 17th birthday
  • 2015-07-18 Sat: End of “The House of Hades” (Novel)
  • 2015-07-19 Sun: Start of “The Blood of Olympus” (Novel)
  • 2015-08-01 Sat: End of “The Blood of Olympus” (Novel)
  • 2015-08-18 Tue
    • Percy-Annabeth’s 1st year Anniversary
    • Percy’s 17th birthday
  • 2015-09-22 Tue*: Percy Jackson and the Singer of Apollo (Short Story)
    • Eve of Fall Equinox
    • Apollo’s Olympus Concert, after sunset, coinciding with the coming Fall Equinox
    • Grover’s birthday
    • Annabeth was in San Francisco with her dad
  • 2015-09-23 Wed*: The Son of Sobek (Short Story)
    • Fall Equinox 04:21 EDT
    • A Percy Jackson and Carter Kane story
    • I remembered El Paso, the winter before last, when my sister and I had been attacked by the crocodile god Sobek.
      • “Last” winter was 2014-12-21 (Winter Solstice)
      • “Winter before 2014-12-21” then was on 2013-12-21 (Winter Solstice), which was “The Red Pyramid” (Novel)
    • Carter described Percy as “maybe 17”, Percy was actually 17 already
    • Was told from the perspective of Carter
    • Was first released as part of “The Serpent’s Shadow” (Novel)
  • 2015-10-24 Sat*: The Staff of Serapis (Short Story)
    • Annabeth’s invisibility cap was working again (it stopped during “The Mark of Athena” [Novel])
    • Was from the perspective of Annabeth
    • Was first released as part of “The Mark of Athena”
    • An Annabeth and Sadie Kane story
  • 2015-11-21 Sat*: The Crown of Ptolemy (Short Story)
    • Percy said we just passed our one-year dating anniversary
    • Percy said he is barely seventeen”, perhaps what he meant was “recently turned seventeen”
    • The crossover series were a month of each other, as Percy explained that this story is “4 weeks” after “The Staff of Serapis”
    • Happened on a Saturday morning, according to Annabeth
    • Was from the perspective of Percy
    • Was announced during the tour of “The Blood of Olympus”
    • Carter said Sadie found out his secret name last year. “Last year” was “The Throne of Fire”, from 2014-03-16 to 2014-03-21

Final Notes

The following are not (yet) included above:

  • Magnus Chase and the Gods of Asgard
    • Book 2: The Hammer of Thor (2016-10-04)
  • The Trials of Apollo series
    • The Hidden Oracle (2016-05-03)
  • Demigods and Magicians (there might be edits in this compilation) (2016-04-05)
  • The Demigods of Olympus series
    • The Two Headed Guidance Counselor
    • The Library of Deadly Weapons
    • My Demon Satyr Tea Party
    • My Personal Zombie Apocalypse
  • Percy Jackson’s Greek Gods
  • Percy Jackson’s Greek Heroes

If you have questions, feel free to leave a comment. Also, if you would like to see the timeline before the release of The Sword of Summer, you can check it in the next page of this post.

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    CC BY-SA 4.0 (Updated) Rick Riordan Mythology Timeline by ᜌᜓᜃᜒ (Yuki|雪亮) is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at Legal Notice.

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