I tell my parents at the INTERVIEW that all children under the age of 4 nap here (or have quiet time). If they don't like my rules there's the door. I NEED MY BREAK. They get it.

If the child does not sleep/rest, then they get termed. The parents also don't tell me what to do while I have their child in my care. MY RULES.

If the parent continues to complain/whine about the situation about the child not sleeping during the day, it's not our problem. Like you stated, children need naps! It's obviously the night-time routine that needs to be changed!