Let's talk about early childhood.
In the French-language schools of Ontario, they have included a program for kindergarten and junior kindergarten, which is part of early childhood. This integration took place more than 10 years ago. In most cases it allowed the schools to keep the children. My daughter is a good example, even if it is not perfect since our couple is not exogamous.
We note that students stay in the French school in grade 1 because they are already there, either in junior kindergarten or kindergarten. Since they are already in the physical premises, this creates a habit, either for school buses or routine. It creates habits that the parents keep because they don't want to disrupt their children's lives.
It isn't just a matter of day care spaces for very young children, but also for kindergarten and junior kindergarten.