I am 100% for parent choice in this area but I do struggle with @Userflower saying “Who wouldn't want their child to be the oldest in the class rather than the youngest!?” Erm, me!!!!!
I have two children - one born on 28th August and one on 1st September. Both are in the correct year. The August one was so ready for school it would have been a massive mistake to defer. Apart from messy handwriting in reception and Y1 due to pencil grip and taking four months longer to skip than her friends, she suffered absolutely zero by being the youngest in the year.
The September one really struggled socially and academically being the oldest in the year. A funny skew in birth dates meant that only three class mates had birthdays before March and the rest were all summer born. She was watching “Mia and Me” on TV and her friends were still on Peppa Pig, for example. The gap in what they were interested in playing with was huge. She was also able to whizz through the class work and could do everything. Extension work was provided but she could do that too. So she ended up having to help her friends do their work which caused resentment.
We even talked with the school about putting her up a year (they were willing) but ultimately we decided against it.
As she got older all these gaps have narrowed and it’s not an issue, but the first few years at primary weren’t all glowy and wonderful. Deferring could come with some negatives as well as positives (sports teams for one as well as aspects above).
Everyone wants the best for their child and there are some exceptionally good reasons to defer some children. I’m not sure deferring an April baby just because you can, is necessarily the right thing. Every child is different and the priority should be is it right for them.