[kanbara]

this is a thing in the us as well—- tho the cutoff is august or september normally. there’s no name for it, but it’s real.

and american kids are also way more like to make friends in their school peer age group. i believe this is almost a universal truth for the first world

[rafram]

Absolutely true in elementary/middle school, and even a bit in the early parts of high school and college (upperclassmen don't want anything to do with "freshmen"), but in the adult world, I don't think age gaps of 5+ years between friends are uncommon at all.