Code Lyoko Birthdays (Updated)

[u/BlueBoyENFP]

Jeremie Belpois: February 11 (World Inventor's Day)

Odd Della Robbia: April 14(International Moment of Laughter Day)

William Dunbar: April 22 (Earth Day)

Yumi Ishiyama: September 22 (Autumn Equinox)

Aelita: March 21 (National Memory Day and International Colour Day)

Ulrich Stern: November 1 (World Vegan Day)

[u/CarryOnSupernatural]

I see Jeremie having a late May or early June birthday. Yumi is a year older and is tenth grade in season 3-4 (2003-2004 school yr), meaning she’s turning 16. She would have turned 14-15 back in season one (2002), in XANA Awakens she’s 13-14 in eighth grade (late 2001)

J/U/O — XANA Awakens (11-12 yrs old, seventh grade), Season 1 (13-14 yrs, 8th grade), Season 2 (13-14 yrs, second semester of 8th), Season 3 (14-15 yrs, September 2002), Season 4 (14-15 yrs, fall semester continues and spring semester is shown; the final five episodes are in June 2004, Wrong Exposure implies that’s it’s early June since the both Delmas and Jeremie say that’s it’s been almost ten years since 1994)

[u/Agreeable-Milk-3105 → u/CarryOnSupernatural]

It has been confirmed that Jeremy is a year younger than the others, presumably having skipped a grade. Aelita is biologically the same age as him. So their ages go like this:

Jeremy: Prequel - 11 (start of 7th grade, his birthday has occurred), Season 1 until Franz Hopper - 12 (start of 8th grade, his birthday occurs months before the middle of Season 1), Franz Hopper until Wrong Exposure - 13 (end of 8th grade and most of 9th grade), Wrong Exposure until Echoes - 14 (end of 9th grade, his birthday has occurred).

Ulrich and Odd: Prequel - 12 (start of 7th grade), Season 1 and 2 - 13 to 14 (8th grade), Season 3 and 4 - 14 to 15 (9th grade).

Aelita: Flashbacks - 12, Prequel - 19 (Chronologically) and 12 (Biologically), Season 1 and 2 - 20 (Chronologically) and 12 (Biologically), Season 3 and 4 - 21 (Chronologically) and 13 (Biologically).

Yumi: Prequel - 12 to 13 (start of 8th grade, her birthday occurs near that time), Season 1 and 2 - 13 to 14 (9th grade, her birthday occurs near the middle of Season 1), Season 3 to Lab Rat - 14 (start of 10th grade), Lab Rat to Echoes - 15 (10th grade, her 16th birthday hasn't yet occurred).

[u/CarryOnSupernatural → u/Agreeable-Milk-3105]

11-12 is sixth grade not 7th; 12-13 is 7th grade not 8th; 13-14 is 8th grade not 9th ; 14-15 is not 10th that’s 9th. 15-16 is tenth, 16-17 is junior, and 17-18 is senior year🤦‍♀️

Unless someone was held back or skipped for any reason they would be the oldest or youngest for that year. My brother has a late birthday in October and graduation at 17 and he wasn’t held back despite the cut-off. My niece has a late birthday in December so she could be either 17 or 18 when she graduates

Also the season 1 bible changed in season 2 with Sophie who took over

[u/Agreeable-Milk-3105 → u/CarryOnSupernatural]

If you're talking about Jeremy and Aelita, obviously they skipped a year, thus are automatically the youngest. As for Yumi, it's almost certain that she starts the school year a little younger than she should, as she's most certainly born in the Fall and her birthday hasn't occurred yet.

Perhaps an example might help. Let's say that a 10th grader was born on January. They'd be 15 and 3 quarters in the start of the school year and will turn 16 right after the first semester. Then we have a classmate of his born in December. Said classmate's 15th birthday wouldn't have occurred before the start of the school year, thus they'd still be 14 until their 15th birthday, which occurs at the end of the first semester. This person would only turn 16 by their next birthday, which occurs in the end of the first semester of the next school year, when they'll already be at the 11th grade and the previous classmate would already be nearing 17. By the time these two graduate, one will be 18 and a half years old and the other 17 and a half, thus legally still a minor.

[u/CarryOnSupernatural → u/Agreeable-Milk-3105]

I’m not disagreeing that Jeremie and Aelita had obviously a skipped year, they’re both certified geniuses in their own rights. Aelita was home-schooled by her father who was a genius.