Information regarding the actual date is vague but a relatively accurate timeline of events is possible.
In the series
In 1998, Karina Milsa is born.
In 2025, Dr. FRANXX is asked to join APE. In 2030, they discover how to stop ageing but it leads to infertility.
In 2036, humanity's immortality rate exceeded 70%.
In 2037, the klaxosaurs made their first appearance, destroying a mining facility and making landfall, only stopping after several nuclear missiles hit it. The eastern half of the Australian continent became an exclusion zone.
In 2042, they hold the 13th startup trial for the FRANXX prototype. It hit a roadblock where it wouldn't start up. After rigorous testing, it was discovered that the pilot needed to possess reproductive functions.
|14 years prior to Episode 01||February 6th: Mitsuru is born
February 27th: Zero Two is born
March 30th: Miku is born
June 6th: Kokoro is born
October 15th: Hiro is born
December 3rd: Zorome is born
|5 years prior to Episode 01||Hiro gives names to all the parasites. Mitsuru undergoes an Elixirs Injection. Hiro helps Zero Two escape but both are captured and their memories are erased.|
|Episode 06||Two years before the plantations' kissing, 090 fights alongside Zero Two and loses his partner.|
|Episode 01||July: Squad 13 is assigned to a capacity test in which all but Hiro and Naomi pass.
A graduation ceremony for the parasites of Squad 13 is held. It is interrupted by a klaxosaur attack.
|Episode 02||The day after the klaxosaur attack, the startup ritual picked up where it left off.|
|Episode 03||Squad 13 does a mock battle and then against a group of klaxosaurs.|
|Episode 04||Squad 13 successfully defends their plantation from a worm-type Klaxosaur with the help of Strelizia.|
|Episode 05||The ceremony for the plantation's kissing is held. The next day, they discuss it. At 7:00, they have breakfast, and klaxosaur are detected. An hour later, a meeting is held. 33 hours from the meeting, the klaxosaur arrive.|
|Episode 06||Plantations 13 and 26 commence ‘kissing’ for magma energy refuel and fight against a Gutenberg class klaxosaur.|
|Episode 07||August: Squad 13 is awarded a trip to the beach.|
|Episode 08||Squad 13 goes through a gender conflict.|
|Episode 09||Squad 13 battles a Gutenberg class klaxosaur.|
|Episode 10||Squad 13 is invited to the city to receive an award.|
|Episode 11||Janurary: From the kill chart displayed by Nana at 3:20, approximately 26 weeks have passed since episodes 1-3.|
|Episode 12||Janurary 30th: Squad 13 is sent back to the Garden for testing before going into battle.
Goro mentions it has been no less than six months since they left the Garden.
|Episode 13||Hiro regains his lost memories of Zero Two from his childhood.|
|Episode 14||Hiro is admitted to the hospital on February 2nd.|
|Episode 15||Squad 26 self-destructs to stop a super-Lehmann class klaxosaur but fail.
Squad 13 and the 9’s defeat the klaxosaur and open the door of Gran Crevasse.
Parasite reserves drop to 60% due to the high number of casualties and more than a dozen plantations are destroyed. Plantation 13’s Miltisteinn survives.
|Episode 16||March: Squad 13 is left alone at their boarding home and they learn to tend to themselves.
Zorome mentions it has been a month since the events from the previous episode.
|Episode 17||Mid April: Kokoro and Mitsuru enter an intimate relationship.|
|Episode 18||Kokoro and Mitsuru hold a wedding ceremony but are taken away in the middle of it and their memories are erased.
Based on the blooming phase of the sakura trees, least two weeks have passed between episodes 16-18.
At the Bird Nest, Zorome comments a couple of weeks have passed since the wedding.
|Episode 19||Late April-early May: Papa agrees to release Squad 13 from their duties if they win the final battle at Gran Crevasse.|
|Episode 20||Nana's replacement says that they'll boot up the Star Enterprise the next day.
The VIRM, led by Papa and the Vice Chairman, invade Earth and fight the klaxosaurs.
The Klaxosaur Princess links with Hiro.
|Episode 21||Hiro and Zero Two reconnect and force the VIRM to retreat.|
|Episode 22||Kokoro is admitted to the hospital and learns she is pregnant on May 8th. Based on her hCg results, she is approximately four weeks pregnant.|
|Episode 23||Squad 13 and the 9’s battle the VIRM in space, and Hiro and Zero Two leave through a warp gate on May 10th.|
|Episode 24||July 19th: 70 days after the gate passage, Hiro and Zero Two fight an armada of VIRM.
July 21st: 72 days after the gate passage, the parasites begin cultivating a self-sufficient lifestyle.
January 10th: 245 days after the gate passage, Kokoro gives birth to her and Mitsuru’s first child, Ai.
July 1st: 783 days after the gate passage, Hiro and Zero Two sacrifice themselves to destroy the VIRM planet.
- Hiro: "The day after the klaxosaur attack, the startup ritual picked up where it left off, but in much quieter circumstances."
- -- in Episode 02
- Announcer: "Kissing will commence in 175 hours."
- -- in Episode 02
- Kokoro: "Yesterday's ceremony was something else, huh? I was so excited, I had trouble getting to sleep last night."
- -- in Episode 05
- 090 (to Zero Two): "The joint operation two years ago! Your reckless fighting style got us isolated on the battlefield, and I lost my partner!"
- -- in Episode 05
- Hachi: "It was on the doctor's orders that we didn't contact you over the past month."
- -- in Episode 17