Sunshine is in short supply across the northern Europe, shrouded in heavy cloud from a seemingly never-ending series of low pressure systems. In the last months of 2017, the inhabitants of these countries experienced one of the darkest winters ever recorded. Exposure to natural light inhibits the secretion of melatonin, which stimulates sleep and favors the production of hormones that stimulate the body. Lack of it can lead to seasonal depression, the symptoms of which include lack of energy and drowsiness. Also, this fact is associated with high suicide rate.
For few days a short “break” of sunshine took place.