I guess some parents asume that our "open" hours mean that we are ready and working as an office worker would be even if they had no actual clients or work on their desk yet. I do understand this asumption, especially if the contract has those hours on it and they pay for the full day. They don't necessarily know when other kids arrive or leave. I would just make sure to explain to them that you normally don't have any kids who arrive before 7:30, so in the future she will need to let you know the day before if she needs to drop her child off earlier. I have never had anyone show up early, but I am only open 9.5 hours and 4 out of 5 of my clients are 7:30-4:30 (clients get a max of 9 hours)...my first arrival is at 7:30 on the dot, so it isn't much of an issue for me. In future I will be changing the 5th family to 7:30-4:30 as well (once they go on mat leave)...that way everyone is more or less on the same schedule. But again, it could happen that all clients normallu drop off at 8am...then I would make sure to let everyone know that they will need to tell me the day before if they are dropping off earlier than that.