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A binary clock is a clock that displays the time of day in a binary format. Originally, such clocks showed each decimal digit of sexagesimal time as a binary value, but presently binary clocks also exist which display hours, minutes, and seconds as binary numbers. Most binary clocks are digital, although analog varieties exist. True binary ...
The clock by the gate was probably the first to display Greenwich Mean Time to the public, and is unusual in using the 24-hour analog dial. Also, it originally showed astronomical time which started at noon, not midnight. The gate clock distributed the time publicly; another time signal of the observatory was the time ball, since 1833. The time ...
Moore donated two clocks, built by Thomas Tompion, which were installed in the 20 foot high Octagon Room, the principal room of the building. They were of unusual design, each with a pendulum 13 feet (4.0 metres) in length mounted above the clock face, giving a period of four seconds and an accuracy, then unparalleled, of seven seconds per day.
The Time from NPL is a radio signal broadcast from the Anthorn Radio Station near Anthorn, Cumbria, which serves as the United Kingdom's national time reference. [1] The time signal is derived from three atomic clocks installed at the transmitter site, and is based on time standards maintained by the UK's National Physical Laboratory (NPL) in Teddington. [2]
Instead of hours and minutes, in Swatch Time the mean solar day is divided into 1,000 equal parts called .beats, meaning each .beat lasts 86.4 seconds (1.440 minutes) in standard time. The time of day always references the amount of time that has passed since midnight (standard time) in Biel, Switzerland , where Swatch's headquarters is located.
Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer. United Kingdom, where the summer time is called British Summer Time (BST) Ireland, where it is called Winter Time, [22] changing to Standard Time in summer. [21] Portugal (with the exception of ...
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In subsequent years, clocks continued to be advanced by one hour each spring (to BDST) and put back by an hour each autumn (to BST). On 15 July 1945, the clocks were put back by an hour, so BDST reverted to BST; the clocks were put back by an additional hour on 7 October 1945, so BST reverted to GMT for the winter of 1945. [6]