Six months of darkness is a bit hyperbolic, to say the least. The sunshine, temperature and daylight situation in Denmark is on the whole comparable to what you'd find in Germany, the UK, and Northern France.

Also, long winters? You're thinking about Canada. The daily mean temperature in Aarhus, Denmark in January (the coldest month) is 1.3 C (34.3 F). https://en.wikipedia.org/wiki/Aarhus#Climate.

By comparison, Montreal, Canada has a daily mean temperature in January of -9.2 C (15.4 F).