I have a late August girl, bright but socially not ready for school at 3y +51weeks. We deferred, she’s starting September and so much readier for it. No additional needs.
We have a May born boy who is due to start Sept 2026 and feel there may be some additional needs at play so we are keeping the door open, though I’m aware turning 6 in the term is a lot more socially difficult than 2 weeks before Autumn term starts. He has similar worries to your little one, OP.
I know you’re not asking about deferral and it’s a bit of a mumsnet hot topic so will leave that one there, but agree it’s one to consider.
I’m personally not a fan of the idea of part time (I have a job, for starters!) but also I think it’s delaying the inevitable.
You have my sympathies, they are so small at that age and I do worry that forcing them into a situation they’re not comfortable with sets the tone for a pretty bleak educational experience. For me, I’m hoping that seeing his big sister enjoying school will help my DS decide it’s a good thing.
Do you have any other concerns around development - potty training etc? If it’s just the school thing I’d be inclined to take the plunge and see how he gets on, if you think there’s more at play I’d take the time to have a year and work out a little more if there’s other needs to consider.
Good luck - with our DD being so close to the cut off I didn’t really question it, it’s so hard with the earlier summer borns (esp boys) if you think they’re not ready. Remember, it’s not just ‘reception at newly 4’, its ’year one and formal learning at just turned 5’, secondary at newly 11, GCSE options when they’re still 12 or 13, and so on.