A worker is considered a night worker if they:
typically work at least 3 hours between 21:00 and 06:00, or
are expected to work at least one-third of their annual working hours during the night period.
For night workers:
Daily working hours must not exceed 8 hours on average, calculated over the applicable reference period (normally 24 hours or longer under agreements).
Additional restrictions may apply for dangerous or physically demanding night work.
For further information, please consult the following official resource: Working hours – Norwegian Labour Inspection Authority:
For any queries relating to these rules, please contact the competent authority directly: