It's a different thing in the summer - it does not
get dark at all (even in the middle of night). The
local authorities do not accept a night flight as
night time for the time between first of May and
last of August.
Wow... I had never thought of that before - an entire country of pilots
who are not night current as of July 31 every year.

(at least by
the FAA rules)
--
Guy