I had three teachers in care and all had one year olds when I started here in Ottawa. That gave them the choice of paying only for part of Christmas or March break or using the days since at the time it was hard to get kids and teachers especially as they expected to not have to pay. My version was like a compromise to them and they agreed to care.

Since then I have kept it in. Some families don't use the 5 days at all. Some use them at Christmas which is the most common and I don't really care since it gives me free days. I also found that parents did keep kids home when sick and use a day and one day of lost income meant no fighting with parents over bringing sick kids and less got sick so it worked all around.
5 days for 10 months works out to half a day a month and that is not a lot of lost income. Parents get a sense of not being nickle and dimed either and compared to when I didn't do it I really think it has helped our relationship - yes we are a business first but we are in a service industry and I'm sure we all remember which restaurants treated us better than the others and are more loyal to them etc.