daylight saving time

English Edit

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Noun Edit

daylight saving time (countable and uncountable, plural daylight saving times)

  1. The practice in some places of adjusting clocks forward in the spring and back in the fall, usually by one hour, so that the adjustment causes the time to coincide with the greatest period of illumination by the sun over the course of the day.
    • 2005: -- Daylight Saving Time is a change in the standard time of each time zone. ... The American law by which we turn our clock forward in the spring and back in the fall is known as the Uniform Time Act of 1966. The law does not require that anyone observe Daylight Saving Time; all the law requires is that if we are going to observe Daylight Saving Time, it must be done uniformly. [1]

Usage notes Edit

The form daylight-saving time, with a hyphen, is best grammatically; the phrase "daylight-saving" acts as an adjective describing time. The AP Stylebook and the University Style Guide (of The University of Southern Mississippi) both require this hyphenated form.

Daylight Saving Time, without the hyphen, is the official name in the United States.

See also usage notes at daylight savings time with an "s" after "saving".

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