At my school (ACS International Baccalaureate) parents could influence the year their child was in. Senior year had a 19 year old student who turned 20 before graduating, my year (16-17 had a 19 year old) and the senior year, my boyfriend at the time was a week older than me but in the year above. I'm born in January and he was born late December.
Would they allow the same for my son? He is an August baby and I don't want him to be the youngest in his school year.