I am in the process of changing my contract this weekend to include this. I get pretty tired of changing my contract all the time. There are times that new parents see the contract and look at me like I am crazy, especially when they see things like "It is not acceptable to leave your child in my home without letting me know they are there. Leaving a child in my care without my knowledge will bring about immediate termination without reimbursement of day home funds" or something like that. I have actually had people do things like that.
I send out an email reminder before closed days, it is on the activity planner I email every month that outlines every daily activity, it is on the weekly menu planner that is emailed out ever Sunday night, it is on the daily helper schedule that I email out every month and is on the newsletter as well. It isn't that hard to remember a day off.
Anyways I let it go and am just changing the contract as she said "it isn't in the contract that I can't do that". People are ridiculous.