In principle, maximum working hours per day must not exceed 8 hours. However, the employee can work up to 10 hours on a day if an average of 8 hours per working day is not exceeded within 6 calendar months or within 24 weeks.
If an employee qualifies as night worker (see below), the maximum working hours per day must not exceed 8 hours on average over a reference period of 4 weeks. This means that the employee can work up to 10 hours on a day so long as the daily average working time (over a consecutive 4-week period) does not exceed 8 hours per day.