However, the recent acceleration in Earth’s spin may require timekeepers to subtract a second for the first time ever.

Dr Graham Jones, a TimeAndDate astrophysicist, said: “If the Earth’s rotation continues to quicken, we may at some point require a negative leap second.

“If this happens, our clocks would skip a second, in order to keep up with the hurrying Earth.”

While the average length of a day is 86,400 seconds, an astronomical day will this year clock-in on average 0.05 milliseconds shorter.

This will equate to a 19 millisecond lag in atomic time over the aggregate of the year.





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