* The formal term for the time in winter is Danish normal time, DNT. In an international context, this corresponds to the coordinated universal time, UTC, plus one hour. This is what has previously been referred to as Greenwich Mean Time – GMT.
* Summer time lasts seven months from the last Sunday in March to the last Sunday in October.
* In the autumn, the clock must be set one hour back to “normal time” from 03.00 to 02.00. In other words, we get an extra hour.
* In the spring, the clock must be set one hour ahead from 02.00 to 03.00. It “costs” an hour.
* Due to the adjustment of the time, it will be brighter in the autumn when going to work on Monday morning, compared to the same time of day the week before.
* Summer time was first introduced by Austria and Germany in 1916 to save energy and thus oil, which was scarce due to the First World War.
* A number of European countries – including Denmark – followed suit on 21 May the same year.
* Summer time came again from 1940 to 1948, but did not become permanent in Denmark until 1980.
* Following a standardization in the EU in 1996, the whole Union follows at the same time. In total, about 70 countries have introduced the summer time scheme.
* The rules on summer time are laid down in an EU directive.
* In 2018, however, it came up at EU level to abolish the annual shifts back and forth.
* In an internet survey, 4.6 million EU citizens answered whether they supported the proposal. 84 percent said yes.
* The European Parliament also voted to make summer time a thing of the past after 2021.
* However, the final negotiations cannot begin until the individual EU countries have taken a position on the proposal. And there has not been full support.
Sources: Den Store Danske, Eur-lex and Ritzau.
Source: The Nordic Page