Daylight saving time is the convention of advancing clocks so that afternoons have more daylight and mornings have less. Typically clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn; the ancients lengthened summer hours instead. Presaged by a 1784 satire, modern DST was first proposed in 1907 by William Willett, and 1916 saw its first widespread use as a wartime measure aimed at conserving coal. Despite controversy, many countries have used it since then; details vary by location and change occasionally. Adding daylight to afternoons benefits retailing, sports, and other activities that exploit sunlight after working hours, but causes problems for farmers and other workers whose hours depend on the sun. Extra afternoon daylight cuts traffic fatalities; its effect on health and crime is less clear. DST is said to save electricity by reducing the need for artificial evening lighting, but the evidence for this is weak and DST can boomerang by boosting peak demand, increasing overall electricity costs. DST's clock shifts complicate timekeeping and can disrupt meetings, travel, billing, medical devices, and heavy equipment.

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Extermination of Evil is a set of five paintings believed to have been created in the 12th century, depicting traditional Asian deities banishing evil. The paintings are collectively listed as a National Treasure of Japan and held at the Nara National Museum. Clockwise, from top left: Sendan Kendatsuba, Shinchū, Bishamonten, Tenkeisei, and Shōki.

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• ... that the figure of Abbé Morio in Leo Tolstoy's War and Peace was modeled on Scipione Piattoli, one of the drafters of the Polish Constitution of May 3, 1791?
• ... that the Buryat people (pictured) use the alcoholic beverage tarasun in their religious ceremonies?
• ... that Jambo OpenOffice was the first office suite in Swahili, a language spoken by about a hundred million people?

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• 15 December 1906 – Organization of the The Missouri Folklore Society; encourages study of folklore and arts in Missouri
• 29 December 1937 – Establishment of the Rural Sociological Society
• 30 December 1671 – Foundation of the Académie royale d'architecture by Louis XIV (pictured), king of France under the impulsion of Jean-Baptiste Colbert

“ I mean, you go to the Internet and you can see all these conversations and arguments that our fans have about our music and that's wonderful to know, that people would take the time to be that involved. ” — Alex Lifeson, 1998

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Su Song ( simplified Chinese: 苏颂; traditional Chinese: 蘇頌; pinyin: Sū Sòng; style name: Zirong 子容) (1020–1101 AD) was a renowned Chinese polymath who specialized himself as a statesman, astronomer, cartographer, horologist, pharmacologist, mineralogist, zoologist, botanist, mechanical and architectural engineer, poet, antiquarian, and ambassador of the Song dynasty (960–1279). Su Song was the engineer of a water-driven astronomical clock tower in medieval Kaifeng, which employed the use of an early escapement mechanism. The escapement mechanism of Su's clock tower had previously been invented by Buddhist monk Yi Xing and government official Liang Lingzan in 725 AD to operate a water-powered armillary sphere, although Su's armillary sphere was the first to be provided with a mechanical clock drive. Su's clock tower also featured the oldest known endless power-transmitting chain drive, called the tian ti (天梯), or "celestial ladder", as depicted in his horological treatise.The clock tower had 133 different clock jacks to indicate and sound the hours. Su Song's treatise about the clock tower, Xinyi Xiangfayao (新 儀 . 象 法 要), has survived since its written form in 1092 and official printed publication in 1094. The book has been analyzed by many historians, such as Joseph Needham. However, the clock itself was dismantled by the invading Jurchen army in AD 1127, and although attempts were made to reassemble the clock tower, it was never successfully reinstated. Although the Xinyi Xiangfayao was his best known treatise, the polymath had other works compiled as well. He completed a large celestial atlas of several star maps, several terrestrial maps, as well as a treatise on pharmacology. The latter discussed related subjects on mineralogy, zoology, botany, and metallurgy. ( Full article...)

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