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What is Daylight Saving Time mean?
Daylight saving time (DST), also known as daylight savings time or daylight time (the United States and Canada), and summer time (United Kingdom, European Union, and some others), is the practice of advancing clocks (typically by one hour) during warmer months so that darkness falls at a later clock time. The typical implementation of DST is to set clocks forward by one hour in the spring ("spring forward") and set clocks back by one hour in autumn ("fall back") to return to standard time. As a result, there is one 23-hour day in late winter or early spring and one 25-hour day in the autumn.
The idea of aligning waking hours to daylight hours to conserve candles was first proposed in 1784 by American Benjamin Franklin. In a satirical letter to the editor of The Journal of Paris, the American inventor suggested that waking up earlier in the summer would economize candle usage and calculated considerable savings. In 1895, New Zealand entomologist and astronomer George Hudson seriously proposed the idea of changing clocks by two hours every spring to the Wellington Philosophical Society. He wanted to have more daylight hours to devote to collecting and examining insects. Though the idea received some serious consideration in 1907 in the United Kingdom when British resident William Willett presented it as a way to save energy, it was never implemented.
Starting on April 30, 1916, the German Empire and Austria-Hungary each organized the first nationwide implementation in their jurisdictions. Many countries have used DST at various times since then, particularly since the 1970s energy crisis. DST is generally not observed near the equator, where sunrise and sunset times do not vary enough to justify it. Some countries observe it only in some regions: for example, parts of Australia observe it, while other parts do not. The United States observes it, except for the states of Hawaii and Arizona. (Within the latter, however, the Navajo Nation does observe it, conforming to national practice). A minority of the world's population uses DST; Asia and Africa generally do not observe it.
DST clock shifts sometimes complicate timekeeping and can disrupt travel, billing, record keeping, medical devices, and sleep patterns. Computer software generally adjusts clocks automatically.
referencePosted on 05 Nov 2024, this text provides information on Miscellaneous in Time related to Time. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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