#Overfloy Family Tree

[kuuderekun]

The Overflow Wiki has Birthdates including Gregorian Calendar Years for the School Days Characters.

On their Character Pages, but the Timeline page itself states no Year dates are definitively given.

And I don't think the years given on these pages proper though put into them based on how Japanese School Years work.

You see in Japan the School Years is April-March So I'm pretty sure that means Setsuna being born in February and Saionji in December of 1988 would not actually be in the same Grade. Now if their Birthdays do come from Canonical Material then Setsuna is more likely to be born 2 months after Sekai rather then 10 month before. Maybe I'm mistaken and there is some nuance to how who is in what School Year is decided I'm missing.

Japanese High School is also only three years, and it seems you generally begin as 15 expected to turn 16 before that School Year is over and end it as an 18 year old.

So on this Wiki

Setsuna is February 14 1988

Sekai is December 7 1988

Taisuke Sawanaga is July 19th but a year isn't given

Makoto Itou is October 16 1988

Kotonoha Katsura is January 4 1988 (Kokoro is November 28 but no year)

So they decided to put all the cast in the same Grade as 1988.

If School Days takes place in the then present of when it was released, then all these character being in their First Year of Japanese Highschool would more likely have been born April 1989 to March 1990. Coincidentally the first year of the Heisei era. Their Conceptions would then by the the Summer of 1988 through Spring of 1989.

School Days dropped in April of 2005 however, so maybe it wouldn't make it that much of a period piece to imagine it's drama as being primarily set in 2004 moving those estimates down a year.

Setsuna and Sekai's mothers were previously Heroine of the original Summer Radish Vacation. It's heavily implied we're supposed to assume that Setsuna and Sekai were conceived during or within a year following the events of that game.

Based on the title I'm assuming that game takes place during Summer Vacation. Summer Vacation from School in Japanese is only 6 weeks not the 3 months we Americans are used to (and certainly not the 104 days of Phineas and Ferb's OP), generally starting around July 20th and ending around the end of August. Neither Setsuna or Sekai's prosed birthdays fit being conceived during those 6 weeks.

Regardless of what Gregorian Calendar Dates you choose to lynchpin the Overflow timeline to, Setsuna and Sekai being first years in School Days creates a contradiction between the Overflow Wiki saying Snow Radish Vacation is 30 years before School Days and Summer Radish Vacation is 17 years after Snow Radish. However it could be where ever they got that 30 year estimate from really meant over 30 years.

If the title of Snow Radish Vacation is implying the Winter Holidays, in Japan that's usually December 26 through January 6. But it opens on a sequence set at least 9 months before the main narrative so that would be in March probably, maybe early April.

There is more then one example across School Days HQ and Shiny Days of Youko saying she'd "long" had Sekai already by the time she was Sekai's current age. But if her and Mai are in Middle School during Summer Radish Vacation they sure aren't built like it. Shiny Days also says Youko is exactly 30 if you go down her Route.

It would be really funny if if the most logical timeline places the events of Snow Radish Vacation in 1969.