What time of the day should I start taking the pill?

I'm 15 and im going to be starting the pill in about 3 weeks. It's summer vacation and school is out right now. I want to start it so when school starts, I'm not taking it right in the middle of the school day. So what time of day should I take it? Morning, the time when school would start? Or half way through the day, when school would end? HELP PLEASE.