page_title: Daylight Saving Time
hierarchical_section_title: Daylight Saving Time
caption_attribution_description: English: Larger map of the previous version. Distinguished from summertime in the northern hemisphere and southern hemisphere. &#160;&#160; Northern hemisphere summer &#160;&#160; Southern hemisphere summer &#160;&#160; Formerly used daylight savings &#160;&#160; Never used daylight savings
context_page_description: Daylight Saving Time or Summer Time is a time to timekeep 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, but it hurts 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, some parts of Ukraine and Belarus are countries in Europe without DST.
context_section_description: Daylight Saving Time (DST) or Summer Time (ST) is a time to timekeep 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, but it hurts 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, some parts of Ukraine and Belarus are countries in Europe without DST.
caption: A map showing countries that use daylight saving according to each hemisphere as of September 2019[update].      DST in the northern hemisphere summer      DST in the southern hemisphere summer      DST no longer used      DST never used
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