Work out how many days have been used of the 16-calendar-day employer period during illness, and see when NAV (Norway's welfare agency) takes over paying sick pay.
As a general rule, the employer is required to pay sick pay for the first 16 calendar days of a sick leave — this is called the employer period. If the sick leave continues past day 16, NAV normally takes over paying sick pay from day 17 onward.
Yes. The 16-day employer period is counted in calendar days, not just working days — weekends and any public holidays within the period are included in the count.
From day 17 onward, NAV normally takes over paying sick pay, provided the conditions for sick pay from National Insurance are met and it's been applied for in time.
As a general rule, a new employer period starts with a new sick leave. However, if you become sick again within a short time and it's considered the same illness, the rules for a so-called "new employer period" can apply differently. Contact your employer or NAV if you're unsure about your specific case.