Daylight saving time in Wikipedia || Wiki Video
Channel: Wikinvideos
Date: 2019-11-04

This is the information available for Daylight saving time in Wikipedia as of November 04th, 2019.

Daylight saving time (DST), also daylight savings time or daylight time (United States) and summer time (United Kingdom, European Union, and others), is the practice of advancing clocks during summer months so that darkness falls later each day according to the clock. A common implementation of DST is to advance clocks by one hour in the spring ("spring forward") and retard clocks by one hour in autumn ("fall back") to return to standard time. In other words, there is one 23-hour day in the spring and one 25-hour day in the fall.

George Hudson proposed the idea of daylight saving in 1895. The German Empire and Austria-Hungary organized the first nationwide implementation starting on April 30, 1916. Many countries have used it at various times since then, particularly since the 1970s energy crisis. DST is generally not observed near the equator, where sunrise 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. Only 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, heavy equipment, and sleep patterns. Computer software often adjusts clocks automatically, but policy changes by various jurisdictions of DST dates and timings may be confusing.

To view the full article in Wikipedia: https://en.wikipedia.org/wiki/Daylight_saving_time

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By The illustrator was probably w:John Farey, Jr. (1791–1851). The principal engraver for the encyclopedia was Wilson Lowry (1762–1824).[1] - Abraham Rees (1819) "Clepsydra" in Cyclopædia: or, a New Universal Dictionary of Arts and Sciences The image is the JPEG reproduction published 2007-02-01 by the Horological Foundation., Public Domain, https://commons.wikimedia.org/w/index.php?curid=2028026

By Unknown photographer - Photograph (retrieved 2009-10-19) published in a plate opposite page 266 of: Salmon JT (1946). "Obituary. George Vernon Hudson, F.R.S.N.Z. (1867–1946)". Transactions and Proceedings of the Royal Society of New Zealand 76 (2): 264–6. The photo was color leveled (pick white point), cropped, desaturated, and converted to JPEG (quality level 88) with the GIMP 2.6.6., Public Domain, https://commons.wikimedia.org/w/index.php?curid=8125012

By United Cigar Stores Company (sponsor); artist unknown - Library of Congress, Prints & Photographs Division, WWI Posters, LC-USZC4-10663 (color film copy transparency),uncompressed archival TIFF version (60 MB), Public Domain, https://commons.wikimedia.org/w/index.php?curid=1783933

By P Ingerson at English Wikipedia - Originally from en.wikipedia; description page is/was here., Public Domain, https://commons.wikimedia.org/w/index.php?curid=2148588

By http://www.defenselink.mil/afis/editors/lineart_oct.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1328593

By TimeZonesBoy - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=17593495

By Daniel FR, Plenz - Original by Daniel FR, SVG by Plenz, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1837016

By Invent2HelpAll - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=49224720

By Energy Information Administration - http://www.eia.gov/totalenergy/data/annual/archive/038406.pdf (Annual Energy Review 2006, Figure 5.21), Public Domain, https://commons.wikimedia.org/w/index.php?curid=8016101

By SualehFatehi - Daylight Chart, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2307153