It’s a hard one isn’t it? My first two DC are winter babies, so pretty much half way in the age range. Then dc3 is a July baby, and I felt so sad that she was starting school at only just 4 years old... but she was soo ready for it, as in looking forward to it, and being prepared for it.
She was very tired, and not keen on friends coming over to play for most of Reception and Year 1, which would have worried me if she wasn’t dc3 but dc1 is a quiet introvert and DC2 was a social butterfly at primary and I figured she was more like dc1. But she has always been happy, keen to go, thrived, and her teachers have always been pleased.
DC3 is now in y3, and she’s absolutely fine. Exceeding targets, etc, but more importantly very happy and increasingly confident. I see how ‘young’ she seems compared to a couple of the September birthday Queen Bees and my heart does ache a little, but she is blissfully unaware.
I think it is a case by case thing: you know your own child, you will have the best idea of how they will cope. What does their current nursery/ preschool day? Do they have a view?