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Daylight saving time (also called DST, or Summer Time) is the local time a region is designated for a portion of the year, usually an hour forward from its standard official time.It is a system intended to "save" daylight (as opposed to wasting it by, say, sleeping while the sun shines). The official time is adjusted forward during the spring and summer months, so that the active hours of work and school will better match the hours of daylight.
Locations that observe or do not observe DST are listed on the list of time zones.
1 Origin
It is sometimes asserted that DST was first proposed by Benjamin Franklin in a letter to the editors of the Journal of Paris [1]. However, the article was humorous; Franklin was not proposing DST, but rather that people should get up and go to bed earlier.
It was first seriously proposed by William Willett in the "Waste of Daylight" [2], published in 1907, but he was unable to get the British government to adopt it despite considerable lobbying.
Canadian railroad engineer Sir Sandford Fleming invented and proposed Standard Time, which first divided the world into one-hour time zones, in 1878. It was not widely adopted by the railways until 1883, and even then it was not supported by any governmental body. However, it relieved the problem of scheduling train stops at separate stations set to their own time based on the local positioning of the sun, and it soon became widely accepted by railroads, freight clients, and passengers.
2 History
The idea of daylight saving time was first put into practice by the GermanThe Federal Republic of Germany ( German: Bundesrepublik Deutschland is one of the world's leading industrialized countries, located in the middle of the European Union. It is bordered to the north by the North Sea, Denmark and the Baltic Sea, to the east government during the First World War between April 30April 30 is the 120th day of the year in the Gregorian calendar (121st in leap years). There are 245 days remaining. Events 313 Roman emperor Licinius unifies the entire Eastern Roman Empire under his rule. 1492 Spain gives Christopher Columbus his commis, 19161916 is a leap year starting on Saturday (link will take you to calendar) Events January 1 -The first successful blood transfusion using blood that had been stored and cooled. Impressionist Monet paints Water Lilies'. January 8 Allied forces withdraw from and October 1October 1 is the 274th day of the year (275th in Leap years). There are 91 days remaining. Events 331 BC Alexander the Great defeats Darius III of Persia in the Battle of Arbela 959 Edgar the Peaceable becomes king of all England 965 John XIII becomes Pop, 1916. Shortly afterwards, the United KingdomThe United Kingdom of Great Britain and Northern Ireland is a state in Western Europe, usually known simply as the United Kingdom the UK Britain or less accurately as Great Britain . The UK was formed by a series of Acts of Union which united the formerly followed suit, first adopting DST between the 21st of MayMay 21 is the 141st day of the year in the Gregorian calendar (142nd in leap years). There are 224 days remaining. Events 996 Sixteen year old Otto III is crowned Holy Roman Emperor. 1674 John Sobieski is elected by the nobility to be the King of Poland., 1916 and the 1st of October, 1916. Then on March 19March 19 is the 78th day of the year in the Gregorian calendar (79th in leap years). There are 287 days remaining. Events 1279 Mongolian victory in the Battle of Yamen ends the Song Dynasty in China. 1687 The men under explorer Robert Cavelier de La Salle, 1918 the United States Congress established several time zones (which were already in use by railroads since 1883) and made daylight saving time official (which went into effect on March 31) for the remainder of World War I. It was observed for seven months in 1918 and 1919. The law, however, proved so unpopular (mostly because people rose earlier and went to bed earlier than in modern times) that the law was later repealed.
Daylight saving time was reinstated in the United States on February 9, 1942, again as a wartime measure to conserve resources, this time in order to fight World War II. This remained in effect until the war began winding down and the requirement was removed on September 30, 1945. From 1945 to 1966, there was no federal law about daylight saving time. States and localities were free to observe daylight saving time or not. The Uniform Time Act of 1966 mandated that daylight saving time begin nationwide on the last Sunday of April and end on the last Sunday of October. Any state that wanted to be exempt from daylight saving time could do so by passing a state law, provided that it exempts the entire state. The law was amended in 1972 to permit states that straddle a time zone boundary to exempt the entire area of the state lying in one time zone. In response to the 1973 energy crisis, daylight saving was begun earlier in both 1974 and 1975, commencing on the first Sunday in January in the former year and the last Sunday in February in the latter. The law was amended again in 1986 to begin daylight saving time on the first Sunday in April, to take effect the following year.
