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Daylight Saving Time

Daylight Saving Time
Related Category: Astronomy: General
(DST) time observed when clocks and other timepieces are set ahead so that the sun will rise and set later in the day as measured by civil time.

daylight saving time
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Daylight Saving Time: see time (types of).
declination (of a wall): {sometimes called the declining angle or the deviation, to avoid confusion with the sun's declination} [d, DEC] the angle, measured in a horizontal plane, ...

Daylight Saving Time
Daylight Saving Time begins for most of the United States at 2 am local on the second Sunday in March (as of 2007).

Daylight Saving Time
The adjustment to the clock time that is put into effect during the summer to extend daylight one hour later in the evening.

Daylight saving time is the convention of advancing clocks so that afternoons 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....

Although daylight saving time is promoted as a way to use sunlight to save energy, recent research has been limited and reports contradictory results: several studies report savings, but just as many suggest no effect or even a net loss, ...

daylight saving time (NASA SP-7, 1965) See time. daytime visual range (NASA SP-7, 1965) = visual range.

If you are on Daylight Saving Time, subtract one hour to get Standard Time. Then convert this to Universal Time by adding 4, 5, 6, 7, or 8 hours, depending on whether you live in the Atlantic, Eastern, Central, Mountain, or Pacific time zone.

This "daylight saving time" allows people to take advantage of earlier sunrises, without shifting their working hours.

Are you confused by GMT and UTC? You're not sure whether to add or substract hours and what about daylight saving time? This article will explain why this is all necessary and how to deal with time zones.
Why Is The Sky Blue?

If you were to take a multiple-exposure photograph of the same part of the sky at the same time (not counting Daylight Saving Time), every day for a year, the positions of the sun in the image would show the shape of the analemma.

" Daylight saving time began in the United States during World War I primarily to save fuel by reducing the need to use artificial lighting. It became a nation ritual during World War II. However, not every state follows this unnatural act.