No, not an official one. For the most part, i don't need one. I'm open at 730 wed-fri and 745 mon-tues but I've had parents who don't start work until 9/930. Right now all my parents work at 730 and 8 (depending on which parent drops off). I had one parent who didn't work and would drop off anywhere from 9-11 and it drove me crazy!! I eventually told her that she needs to be here by 930 so that we could have smoother mornings and for daughter to get the most out of coming as we do the bulk of our stuff in the morning as most kids were gone an hour after nap when she was here. She didn't like that!! She eventually got a job that started at 10 so it was a bit better after that
Had it been a consistent late drop off, I wouldn't mind so much because than I could plan around it. I never knew when she would get here and that is why I didn't like it.