Does anyone know what actually happens if you have twins born on 31 August and 1 September in terms of school years? Google only offers outraged media speculation that a set of twins born in 2008 might be separated, but no update as to what actually happened in that case or any other. I'm asking on behalf of my son, who is a twin born in early September, and was wondering if he might have got into the year above his sister if he'd been born a few days earlier.