From “Signs of Spring“:

The concept of spring is vital to the Danish people. We are a nation of bi-polars. At the darkest time of year we have only eight hours of light while at midsummer it gets light at 5 a.m. and only barely dark by 11 p.m. In the winter we ground, bundle up, almost hibernate, and often tempers are as short as the day. In the summer we are transformed to outgoing people eager to make the most of every single moment of the gift of light.