What is Daylight saving time?
[[File:DST Countries Map.png|thumb|A map showing countries that use daylight saving according to each [[hemisphere]] {{as of|2023|April|lc=y}}. {{legend|#1b80e6|DST in the [[northern hemisphere]] summer}} {{legend|#ef690a|DST in the [[southern hemisphere]] summer}} {{Legend|#B1B1B1|DST no longer used}} {{legend|#7F7F7F|DST never used}}]] {{multiple image|align=right|direction=vertical|width=150|image1=Begin CEST Transparent.png|alt1=Diagram of a clock showing a transition from 02:00 to 03:00|caption1=Clocks are advanced by one hour during the very early morning at the beginning of DST.|image2=End CEST.svg|alt2=Diagram of a clock showing a transition from 03:00 to 02:00|caption2=When DST ends, clocks are set back (as if to repeat one hour) during the very early morning. Specific times vary.}} '''Daylight saving time''' ('''DST''') or '''summer time''' ('''ST''') is a time to keep during [[summer]]. During the [[summer]] months, the sun stays visible for a longer time, and sunset happens late in the day. For this reason, certain countries advance the time by one hour near the start of summer, and put it back one hour during autumn. DST helps stores that sell to people after they get off work, and it does not hurt farmers and others whose hours are set by the sun. It cuts traffic accident rates. Sometimes it can reduce energy costs, but it can also increase them. Most of the world's countries do not use DST, but it is common in [[Europe]] and [[North America]]. The [[United States]], [[Australia]], the [[United Kingdom]], [[Canada]] and many other countries have DST. These countries also have regions that do not have DST: *[[United States]]: most of [[Arizona]] and [[Hawaii]] *[[Australia]]: [[Queensland]], [[Western Australia]] and the [[Northern Territory]] *[[Canada]]: [[Saskatchewan]] except for a few locations with the border with Alberta and Manitoba, and the [[Yukon Territory]] [[Iceland]], [[Russia]], [[Belarus]], and some parts of [[Ukraine]] are countries in [[Europe]] without DST. {{As of|2024|1}},