On 9 April 1941, the anniversary of the German occupation, the Danish envoy Kauffmann, against the instructions of his government, signed an executive agreement with Secretary of State Cordell Hull, allowing the presence of American troops and making Greenland a de facto United States protectorate.

An acquisition of Greenland would give the United States permanent possession of an island that is crucial to its defense. The country would acquire vast amounts of natural resources—whether found or expected—including petroleum and rare minerals; the island has the largest deposits of rare earths outside China.

Greenland is an autonomous territory within the Kingdom of Denmark. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986.

With up to approximately 21:20 hours the longest days happen in Juni. On the other hand, the longest and darkest nights are in winter (in the southern hemisphere it is the other way around). In Dezember a night in Nuuk lasts almost 20 hours.

The shortest day of the year (the winter solstice) is around the 21st of December. In Reykjavík, that means the sunrise is around 11:30, and sunset is around 15:30. Again, the further north you go in the country, the shorter the day.

The 6 months day/night cycle is exactly happening only at the poles (as pointed out in comments). Between the poles and the arctic circle you have a gradual change from 6 month cycle to the 24 hour cycle. Greenland is partially in this area (south Greenland is actually outside the arctic circle).

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. In Svalbard, Norway, the northernmost inhabited region of Europe, there is no sunset from approximately 19 April to 23 August.

New Zealand