I know when I was a kid (born 1985), the school cutoff was in June. I was born at the end of April. My best friend from school was born in early June. We were in the same grade. My sister, a few years later, was among the oldest in her class after being born in late June. It of course could be that where I grew up is weird or that the cutoff moved significantly at some point, but that’s where the cutoff was for us. It also wouldn’t surprise me if that varies significantly across the country.

Of course, I’m also pretty sure that the full list of professional athletes from my hometown is one professional bodybuilder . . .