Well I don't have any kids yet but I plan on curfews. When I was in high school it was 10pm on School nights IF I was allowed out, I had to have a good reason. It was 11pm on Weekends until I was 17 and then it went to Midnight until I was 18(which was 3 months AFTER high school, and my mom stuck by it

) Occasionally I could extend it for something specific.