Daylight Saving Time (DST), often referred to as “saved time” or summer time, is the seasonal practice of setting clocks forward by one hour during the warmer months so that darkness falls at a later clock time. The main purpose is to extend evening daylight hours and reduce the reliance on artificial lighting and energy. How It Works
Spring Forward: Clocks move ahead one hour in March or April, causing us to “lose” an hour of sleep but gaining more evening light.
Fall Back: Clocks return to Standard Time by moving back one hour in October or November, returning the morning light. Origins and History
The Concept: Benjamin Franklin first whimsically proposed a similar idea in 1784 to save on candle usage. Modern campaigns were later championed by William Willett in the UK in 1907.
The Implementation: Germany and Austria-Hungary were the first countries to officially adopt DST in 1916 during World War I to conserve fuel.
Global Use: Today, about 40% of countries globally observe DST, including most of North America and Europe. Global and Regional Variations
The United States: According to the U.S. Bureau of Transportation Statistics, the Uniform Time Act of 1966 standardized the practice across the country. However, states like Hawaii and most of Arizona choose to remain on permanent standard time.
Exemptions: Many countries near the equator do not observe DST because their daylight hours do not vary significantly between seasons. The Modern Debate 7 Things to Know About Daylight Saving Time | Johns Hopkins
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