son just finished class 9 and now walks to the bakery with his friends at 11 pm. too late?

most nights lately three or four boys from our block go down around 11, walk to the bakery on the main road, come back by 12. phone on, he picks up when i call. partner doesn't mind. i'm the one lying awake till i hear the lift come back up. what time do your teens have to be in