leap second

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leap second

See universal time.

leap second

References in periodicals archive ?
The Emirates Metrology Institute (EMI) has announced that a leap second will be added to UAE standard time just before 4am on July 1 when clocks will read 03.
However, the rotation speed of the Earth fluctuates unpredictably, and has been found to even slow down due to friction caused by the ocean tides -- hence the need for a leap second.
It has made an announcement that one leap second would be added to June 30, 2015, and the clocks would read 11:59:60 p.
The so-called leap second was added to electronic clocks at midnight universal time on Saturday, with atomic clocks reading 23 hours, 59 minutes and 60 seconds before then moving on to Greenwich Mean Time.
Confusion sometimes arises over the misconception that the regular insertion of leap seconds every few years indicates that the Earth should stop rotating within a few millennia.
To see when leap seconds have been added since 1972, go to http://en.
The term "leap second" can also mean the deletion of a second, however, only positive leap seconds have ever been inserted.
1] is the context of a leap seconds cognizant time service, [C.
This is because of the cost of planning for leap seconds and the potential impact of adjusting or turning important systems on and off in synch.
The International Earth Rotation and Reference Systems Service (IERS), based in Paris, is responsible for keeping track of the gap between the precise-atomic clock and the planetary time and deciding when to make additional leap seconds.
Adding to the confusion is the fact that GPS satellites don't use leap seconds.
While I don't like the idea of abandoning leap seconds altogether, I don't think it's unreasonable to let the disparity build up to an hour before making a correction.