leap second

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leap second

See universal time.

leap second

References in periodicals archive ?
This is not science fiction and it's not a joke; this is a worldwide natural occurrence called a leap second.
The ITU World Radiocommunication Conference (WRC-15), currently in session in Geneva from 2 to 27 November, has decided that further studies are required on the impact and application of a future reference time-scale, including the modification of coordinated universal time (UTC) and suppressing the so-called leap second .
In the short term leap seconds are not as predictable as everyone would like," he added.
The last leap second was witnessed in 2012 but as predicted, widespread problems across the globe came to the fore.
Since the procedure was introduced on January 1, 1972, 25 leap seconds have been needed.
According to Stamatakos, the addition of leap seconds was really down to physics.
In some cases it appears that some techies only guessed that the problem was related to the leap second because it happened to occur precisely at the moment of midnight UTC/GMT.
The matter of a simple leap second also cost travellers hours and left passengers stranded all across the country.
As a leap year, and with two additional leap seconds added, it was the longest year ever.
Users never need to set the clock as it automatically adjusts for daylight saving, leap year, and even the earth's wobble in leap seconds.
In order for our civil time (UTC based on TAI) to keep "in step" with the changing earth rotational speed, UT1 leap seconds are added to the year from time to time to compensate for this slowing down.
Since the first leap second in 1972, all leap seconds have been positive.