Since the change will happen after Christmas that is a time of financial issues for many people so using the need to maintain a higher income can be part of the reasoning. I let parents know when they interview that I don't take school age kids at all so once they are ready for JK they must leave. The moms appreciate that their baby won't be out in nasty weather nor have naps disrupted. They forget all about the leaving part and truthfully most have a mat leave in there before the child reaches JK age.

The hard thing here is whether the parent of the 6 year old deserves to know before the end of this school term so he can put his child's name on the school daycare list or start looking for alternate care. Mid term can be a lot harder for them. Can you get a deposit from the mom on mat leave now as in confirming the space.