Летње рачунање времена — разлика између измена

[[Индустријско друштво|Индустријализирана друштва]] обично прате распоред који се заснива на сату за дневне активности које се не мењају током године. The time of day that individuals begin and end work or school, and the coordination of [[Public transport|mass transit]], for example, usually remain constant year-round. In contrast, an [[agrarian society]]'s daily routines for work and personal conduct are more likely governed by the length of daylight hours<ref name=Minnesota>{{cite news |title= Daylight savings time |url= http://www.house.leg.state.mn.us/hinfo/swkly/1995-96/select/time.txt |work= Session Weekly |publisher= Minnesota House Public Information Office |year= 1991 |accessdate= August 7, 2013 }}</ref><ref name=RoSPA>{{cite web |title= Single/Double Summer Time policy paper |date= October 2006 |publisher= Royal Society for the Prevention of Accidents |archiveurl= https://web.archive.org/web/20120913125519/http://www.rospa.com/RoadSafety/info/summertime_paper2006v2.pdf|archivedate=September 13, 2012 |url= http://www.rospa.com/roadsafety/info/summertime_paper2006v2.pdf}}</ref> and by [[solar time]], which change [[season]]ally because of the Earth's [[axial tilt]]. North and south of the tropics daylight lasts longer in summer and shorter in winter, with the effect becoming greater the further one moves away from the tropics.▼

By synchronously resetting all clocks in a region to one hour ahead of [[standard time]], individuals who follow such a year-round schedule will wake an hour earlier than they would have otherwise; they will begin and complete daily work routines an hour earlier, and they will have available to them an extra hour of daylight after their workday activities.<ref name=Hudson_1895_p734>{{cite journal |author= G. V. Hudson |title= On seasonal time-adjustment in countries south of lat. 30° |journal= Transactions and Proceedings of the New Zealand Institute |year= 1895 |volume= 28 |page= 734 |url= http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html }}</ref><ref name="Prerau-115-118">{{cite book |title= Seize the Daylight |pages= 115–118 |title-link= #Seize }}</ref> However, they will have one less hour of daylight at the start of each day, making the policy less practical during winter.<ref name=CRS>{{cite journal |author= Mark Gurevitz |url= http://opencrs.com/document/RS22284/ |title= Daylight saving time |publisher= Congressional Research Service |version= Order Code RS22284 |date= March 7, 2007 |deadurl= yes |archiveurl= https://web.archive.org/web/20140831225402/https://opencrs.com/document/RS22284/ |archivedate= August 31, 2014 |df= mdy-all }}</ref><ref name=Handwerk>{{cite web|last= Handwerk|first= Brian|title= Permanent Daylight Saving Time? Might Boost Tourism, Efficiency|url= http://news.nationalgeographic.com/news/travelnews/2011/11/111104-daylight-saving-time-science-travel/|publisher=National Geographic|accessdate= January 5, 2012|date= November 6, 2011}}</ref>▼

While the times of sunrise and sunset change at roughly equal rates as the seasons change, proponents of Daylight Saving Time argue that most people prefer a greater increase in daylight hours after the typical [[Working time#Workweek structure|"nine to five"]] workday.<ref>{{cite web|url= http://www.snopes.com/science/daylight.asp|last= Mikkelson|first= David|title= Daylight Saving Time|website= Snopes|date= March 13, 2016|accessdate= October 17, 2016}}</ref><ref name=Willett100>{{cite web |title= 100 years of British Summer Time |url= http://www.nmm.ac.uk/explore/astronomy-and-time/time-facts/british-summer-time/ |year= 2008 |publisher= National Maritime Museum |deadurl= yes |archiveurl= https://web.archive.org/web/20141228021630/http://www.nmm.ac.uk/explore/astronomy-and-time/time-facts/british-summer-time |archivedate= December 28, 2014 |df= mdy-all }}</ref> Supporters have also argued that DST decreases [[energy consumption]] by reducing the need for lighting and heating, but the actual effect on overall energy use is [[#Dispute over benefits and drawbacks|heavily disputed]].▼

The manipulation of time at higher latitudes (for example [[Iceland]], [[Nunavut]], [[Scandinavia]] or [[Alaska]]) has little impact on daily life, because the length of day and night changes more extremely throughout the seasons (in comparison to other latitudes), and thus sunrise and sunset times are significantly out of phase with standard working hours regardless of manipulations of the clock.<ref>{{cite news|title= Bill would do away with daylight savings time in Alaska|url= http://peninsulaclarion.com/stories/031702/leg_031702ala0060001.shtml|accessdate= January 5, 2013|newspaper= Peninsula Clarion|date= March 17, 2002|quote= "Because of our high latitudinal location, the extremities in times for sunrise and sunset are more exaggerated for Alaska than anywhere else in the country," Lancaster said. "This makes Alaska less affected by savings from daylight-saving time."|deadurl= yes|archiveurl= https://web.archive.org/web/20131102172846/http://peninsulaclarion.com/stories/031702/leg_031702ala0060001.shtml|archivedate= November 2, 2013|df= mdy-all}}</ref> DST is also of little use for locations near the equator, because these regions see only a small variation in daylight in the course of the year.<ref>{{cite web|last= Rosenberg|first= Matt|title= Daylight Saving Time (Also Known as Daylight Savings Time)|url=http://geography.about.com/cs/daylightsavings/a/dst.htm|publisher= About|date= 2016|accessdate= October 17, 2016}}</ref> The effect also varies according to how far east or west the location is within its [[time zone]], with locations farther east inside the time zone benefiting more from DST than locations farther west in the same time zone.<ref>{{Cite news|url=https://www.washingtonpost.com/news/wonk/wp/2016/03/11/why-daylight-saving-time-isnt-as-terrible-as-people-think/|title=Why daylight saving time isn't as terrible as people think|last=Swanson|first=Anna|date=March 11, 2016|work=The Washington Post|access-date=|via=|accessdate=March 27, 2018}}</ref>▼