Yeah, I know. I work part time. I needed to do exactly this to schedule not working the day I have a doctor's appointment just last week actually. My god you don't even know what I meant when I said dental, do you? Workplace benefits extend well beyond vacation days - health/medical insurance, 401K, stuff like that. Employees can cost far more than just raw salary rates when we're talking full time. If you're not 18 or older, you aren't legally an adult, you're still a minor.