Daylight Saving Time

Daylight saving time (DST)—also summer time in several countries in British English, and European official terminology (see Terminology)—is the practice of advancing clocks so that evenings have more daylight and mornings have less. Typically clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.

Though mentioned by Benjamin Franklin in 1784, the modern idea of daylight saving was first proposed in 1895 by George Vernon Hudson and it was first implemented during the First World War. Many countries have used it at various times since then.

The practice has been both praised and criticized. Adding daylight to evenings benefits retailing, sports, and other activities that exploit sunlight after working hours, but can cause problems for evening entertainment and other occupations tied to the sun. Although an early goal of DST was to reduce evening usage of incandescent lighting (formerly a primary use of electricity), modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited or contradictory.

DST clock shifts present other challenges. They complicate timekeeping, and can disrupt meetings, travel, billing, recordkeeping, medical devices, heavy equipment, and sleep patterns. Software can often adjust computer clocks automatically, but this can be limited and error-prone, particularly when DST protocols are changed.

Read more about Daylight Saving TimeJustification and Rationale, History, Procedure, Politics, Dispute Over Benefits and Drawbacks, Terminology, Computing, Permanent Daylight Saving Time

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Permanent Daylight Saving Time
... A move to "permanent daylight saving time" (staying on summer hours all year with no time shifts) is sometimes advocated, and has in fact been implemented in some ... The United Kingdom stayed on daylight saving time from 1968 to 1971 ... DST without the problems associated with the twice yearly time shifts ...
Time In Indiana - Time Zones - Controversy
... The Indiana time zone debate remains controversial ... the entire state should move to Central Time, while many others believe the state should return to the non-observance of DST ... The part of Indiana on the Eastern Standard Time is actually on geographical daylight saving time year round ...

Famous quotes containing the words time, daylight and/or saving:

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