No, but the average age would be older per grade. I was the youngest, on the younger age of the average. If I waited a year I would have been the oldest, older than the average but receiving the same instruction. I was the best reader/writer but the least social. In sports, where it really matters is the growth of a child. Go to hockeydb.com and look at the birthdate of professional hockey players. The overwhelming majority were born in the first 3 months of the year. Kids start hockey by age group. There is some adjustment for skill, but older kids aren't moved downand only the very top talents move up.