Night work is considered as such between 9 pm and 6 am. The daily duration of night shifts may not exceed 8 consecutive hours.
An employee is a night worker if he works :
at least 2 times a week, minimum 3 hours of night work according to his usual work schedule.
or 270 hours of night work over a reference period of 12 continuous months.
Depending on company agreements, night work can be considered in different ways.