While FLSA regulates how employers compensate workers, it does not set the maximum number of hours employees can work. An employer is free to determine how long you work each day or week, as long as you are at least 16 years old.
For younger workers between ages 14 and 15, FLSA restricts the hours of work. Child labor laws vary among states, but generally, young employees can only work from 7 a.m. to 7 p.m. During school days, they can work for up to 3 hours per day or 18 hours per week. On non-school days, they are restricted to 8 hours daily or 40 hours weekly.