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Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and ...
The offsets range from UTC−12:00 to UTC+14:00, and are usually a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such as in India and Nepal. Some areas in a time zone may use a different offset for part of the year, typically one hour ahead during spring and summer, a practice known as daylight saving time ...
The Clock is an art installation by video artist Christian Marclay. It is a looped 24-hour video supercut ( montage of scenes from film and television) that feature clocks or timepieces. The artwork itself functions as a clock : its presentation is synchronized with the local time, resulting in the time shown in a scene being the actual time.
A world clock is a clock which displays the time for various cities around the world. The display can take various forms: The clock face can incorporate multiple round analogue clocks with moving hands or multiple digital clocks with numeric readouts, with each clock being labelled with the name of a major city or time zone in the world. The ...
The 16th-century church clock at Arnemuiden indicates the time of local high tide as a pointer on a 12-hour clockface. Maassluis. Jacob Venker's tide clock on the exterior of the Nationaal Sleepvaart Museum was installed in 1996. Despite the clock's traditional dial, it is computer-controlled, and accounts for 94 waves in its tidal timekeeping.
The Shepherd Gate Clock ( 51°28′41″N 0°00′05″W) is mounted on the wall outside the gate of the Royal Observatory, Greenwich building in Greenwich, Greater London. The clock, an early example of an electrically connected clock system, was a sympathetic clock mechanism controlled by electric pulses transmitted by a motor clock inside ...
A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an " atomic clock ", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock. Such a clock may be synchronized to the time ...
The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer. The vacuum tube oscillator was invented in 1912. [168]