He shouldn't start fulltime till he's 4, but he may start part-time.
All 3 year olds are entitled to some sort of pre-school, but in my area, that's not at the actual school. As Charlie goes nursery 3 days a week while I work, we'll get some money off every month.
Here there is voluntary Kindergarten from age 3, to age 6 and from then they are in primary school. If they are not ready for primary school yet they go to preschool for a year and start school at 7. Really I'd say 80 % of kids go to Kindergarten and even in the small village I was grwoing up(just short of 10k inhabitants) had 3 Kindergartens.Is nursery for everyone there? Or is it optional? Like here they don't go to preschool/pre-k unless they either can't speak english or qualify in some other way...or if you pay for it, but it isn't required. So here they don't start school until age 5, unless they are in daycare or one of the other things