This web site lets you create civil twilight timetables for airports and airfields in Norway, as mentioned in CAA Norway's VFR Guide (PDF). These times are used in aviation to define when VFR Day and VFR Night applies.
Select the location / airport and year you want to generate a timetable for, and press «Create table».
You will then be able to download the timetable as a PDF file. Please note that times in the table are given in UTC.