Subaru/Hokuto Birthday - Feb 19, 1974
Seishirou - November 22, 1965
In Tokyo Babylon, Subaru is 16 years old in 1990. During the latter part of the series in 1991, he turns 17 (before the flash forward of at least a year). Seishirou turns 26 either in or a bit after Volume 2, since a date mentioned there is November 11th, and we know his real birthday is November 22.
But what bugs me is that Subaru is 16 years old in 1990 and turns 17 in 1991, and is still only a first year high school student. In In Volume 4, Save A (part 1), Hokuto says that Subaru is a first year high school student. Regardless of whether Subaru has already turned 17 by this point, he’s at least a year behind.
Shouldn’t he be a second year high school student going into his third year in April? Which means the next year if he followed this schedule and Seishirou was not a prick, he would have graduated in March of 1992, at the age of 18. Don’t forget, Japan has only three years of high school and students enter their freshman year (grade 10) at 15.
On top of that, Subaru’s birthday is February 19th, which means he would have just turned 16 and entered his first year in high school. Why didn’t he enter when he just turned 15? Like I said, was he too busy with his duties as Sumeragi head and his studies had to wait? But then - especially as head of the prestigious household, wouldn’t it be proper for him to have a good education to know how to run the household besides being an excellent onmyoji?
And is Hokuto in the same grade as Subaru? Or is she in (what I think is) the right grade, 11th?
Did Subaru get into high school a year later because of his duties, is CLAMP messing this up, or am I entirely wrong and missing something?