Conversation so far:
where is it that the sun never sets
In Norway, for about a period of 76 days from late May to late July, the sun never sets for about 20 hours.
are there any other places where the sun never sets besides Norway
A quarter of Finland's territory lies north of the Arctic Circle, and at the country's northernmost point the sun does not set at all for 60 days during summer.
is there a name for when the sun never sets
Midnight sun is when at least a part of the Sun's disk is visible above the horizon 24 hours of the day.
what is the scientific name for midnight sun
The scientific name for midnight Sun is polar day.

Question: what is the opposite called
Self-contained rewrite: what is the opposite of midnight sun called