Wat is the curfew for...?

a 15 and 16 year old female during the week days in georgia? because me(15) and my friend(16) were out and it was almost 10pm and a cop went by a couple of times and we didnt think nothin of it but these kids said my parents were looking for us when they knew where i was at the lake and at my friends sister n laws house but yea like the cop kept comin by until we werent out anymore but my mom was lke driving around lookin 4 us and she picked us up but oh wellz i dont really care haha but oh yea if it has anything to do with it ive been in a lot of trouble with the cops and i am currently in the system so yea any details will be appreciated thnx