A curfew is practical.  Very few children are going to be out late at night without an adult or very good reason. This helps make curfews enforceable as the police will be patrolling anyway, and any responsible adult can report children who are out after curfew. The curfew could therefore be for all young people, defined as those under the age of 18, beginning at 10pm on both weeknights and weekends and ending at sunrise, with the exceptions like those noted in the introduction. Curfew violations are punishable by fines and penalty assessments. In Los Angeles these total $675, and violations may also result in community service and driver's license restrictions. The amount can vary with Philadelphia only having a $250 fine. 1  1. Findlaw