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The Ohio Clock in the U.S. Capitol being turned forward for the country's first daylight saving time on March 31, 1918 by the Senate sergeant at arms Charles Higgins.. Most of the United States observes daylight saving time (DST), the practice of setting the clock forward by one hour when there is longer daylight during the day, so that evenings have more daylight and mornings have less.
Daylight saving time (DST), also referred to as daylight saving(s), daylight savings time, daylight time (United States and Canada), or summer time (United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time.
In equatorial regions, DST is not useful because of the stability of light levels throughout the year. As a result, large areas of South America do not observe DST. DST is used in some of the more southerly countries such as Paraguay and most of Chile. These countries or regions in South America do not use daylight saving time: Argentina ...
The ST Book (also written as STBook) is a notebook-sized laptop released in October 1991 by Atari Corporation. [4] It is based on the Atari ST E. The ST Book is more portable than the previous Atari portable, the STacy , but it sacrifices several features in order to achieve this: notably the backlight, and internal floppy disc drive.
The evolution of United States standard time zone boundaries from 1919 to 2024 in five-year increments. Plaque in Chicago marking the creation of the four time zones of the continental US in 1883 Colorized 1913 time zone map of the United States, showing boundaries very different from today Map of U.S. time zones during between April 2, 2006, and March 11, 2007.
Daylight saving time (DST) is the practice of advancing clocks during warmer months so that darkness falls later each day according to the clock.. Proponents of DST generally argue that it saves energy, promotes outdoor leisure activity in the evening (in summer), and therefore is good for physical and psychological health, reduces traffic accidents, reduces crime or is good for business.
Observed DST with annual time changes in 1973–1978 and 1985–2011, permanently in 2012–2013, with annual time changes in 2014–2022, and permanently since 2022. Kazakhstan: 2004: Observed DST in 1981–1990 and 1992–2004. Kosovo: Observed DST 1941–1945 and since 1983 when it was part of Yugoslavia, Serbia and Montenegro, Serbia or ...
For use, these text files are compiled into a set of platform-independent binary files—one per timezone. The reference source code includes such a compiler called zic (zone information compiler), as well as code to read those files and use them in standard APIs such as localtime() and mktime() .