The time change is being made throughout Europe. Summer time will apply until October 30, when we will return to winter time
The overnight transition from winter time to summer time allows the clock day to be “extended” by one hour. This is of great importance to the economy, mainly because it reduces demand for electricity, and to recreation.
The division into summer and winter time dates back to the beginning of the 20th century and is attributed to the people of Great Britain. However, the first to introduce summer time, known as “wartime,” were the Germans, followed by other countries fighting in the First World War.
In Poland, the time change was first introduced in 1915, after the Russians left Warsaw and the Germans occupied it. In postwar Poland, summer time was introduced in 1957–1964 and again from 1977. It was in effect for one month less than in Western European countries. It is currently used in accordance with the directives of the European Union, where the time change is in force.