Hmmm, I originally was going to enforce the 9 hour rule, but I'm in Toronto, so I was advised that I may have to make it 10 hours,,, I do think it depends where you are- plus some parents may work 8 hours and have 1 hour for lunch, which is 9 hours- then they need travel time,,, so in my handbook, children are "recommended" to be there 9 hours but cannot stay more than 10, and if they do, parents must pay an extra $5