That was our thought but I would change it especially for my son.I sent a late b-day into Kindergarten at the age of four, and was 17 when she graduated HS. I don't regret it for a moment. She was a bit behind in the Fall semesters for the first couple of years, but picked up steam in the Spring each time. By late elementary, she was at the front of the pack. Had we held her back, she would have been more physically developed for HS ball, but it would have been a year of her life sort of wasted in the long run.