Information regarding the actual date is vague but a relatively accurate timeline of events is possible.
In the series
|Episode 19||In 2025, Dr. FRANXX is asked to join APE.
In 2030, they discover how to stop aging but it leads to infertility.
In 2036, humanity's immortality rate exceeded 70%.
In 2037, the klaxosaurs made their first appearence while destroying the mining facility and made 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.
|Episode 06||Two years before the plantations' kissing, 090 fights along side Zero Two and loses his partner.|
|Episode 01||A ceremony for the parasites is held. It is interupted 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 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||Squads 13 and 26 join forces against a Gutenberg class klaxosaur.|
|Episode 07||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||From the kill chart displayed by Nana at 3:20, approximately 26 weeks have passed since episodes 1-3.|
|Episode 12||Swuad 13 is sent back to the Garden for more training before going into battle.
Goro mentions it had 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 13 defeats a Lehmann class klaxosaur at Gran Crevasse.|
|Episode 16||Squad 13 is left alone at their boarding home and they learn to tend to themselves.
Zonome mentions it has been a month since the events from the previous episode.
|Episode 17||Kokoro and Mitsuru enter in an intimate relationship.|
|Episode 18||Kokoro and Mitsuru hold a wedding ceremony but are apprehended by APE and their memories are altered.
Squad 13 days it has been a couple of weeks between the wedding and the memory erasure.
|Episode 19||Papa agrees to release Sqaud 13 from duty 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.|
|Episode 23||Squad 13 and the Nines depart to space to fight the VIRM and Hiro leaves with Zero Two through a warp gate around May 10.|
|Episode 24||70 days after the gate passage, Hiro and Zero Two fight the first colony of VIRM.
72 days after the gate passage, the parasites begin constructing a self-sufficient lifestyle on Earth.
245 days since the gate passage, in January, Kokoro gives birth to her and Mitsuru’s first child, Ai.
783 days since the gate passage, Hiro and Zero Two sacrifice themselves to destroy the VIRM home planet.
3705 days since the gate passage, Squad 13 reunites and reminisce the memory of Hiro and Zero Two during a school entrance ceremony for their children.
- 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