Leap Second: Last Day of 2016 Will Have Its Extra Second

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An additional second shall be added to 2016, which means this yr's December 31 will probably be a second longer than some other December 31s prior to now years.

The "leap second," as it's scientifically referred to as isn't unusual as additional seconds are added both on the stroke of midnight on June 30th or December 31st of any given yr.

Why can we add seconds? These seconds are added relying on whether or not or not the adjustment is required. It's sometimes utilized to Coordinated Common Time (UTC) with a view to hold its time of day near the imply photo voltaic time. In easier phrases, to maintain all our clocks in sync with the Earth's rotation.

As defined by Science Daily, traditionally, we've got two time scales, one that's based mostly on the imply rotation of the Earth relative to celestial our bodies and the second was outlined on this reference body. Nevertheless, in 1967, we converted to UTC, which is predicated off atomic clocks that run with excessive precision and is unbiased of the Earth's rotation.

Though this will sound as whether it is extra correct, drawback rose since then. Vox talked about that Earth's rotation has slowed, which means days have usually been a bit longer. In consequence, discrepancy has shaped between photo voltaic time and official time. Thus, the additional seconds added.

Who screens the discrepancy? The Worldwide Earth Rotation and Reference Techniques Service (IERS) screens the distinction between the 2 time scales they usually determine whether or not an additional second shall be added to the UTC. It's essential to maintain them inside zero.9 seconds of one another. Since leap seconds began getting added in 1972, absolutely 27 out of 44 years have included one. The final was June 30, 2015.

When does it occur this yr? When precisely that leap second shall be added is dependent upon your time zone. However as talked about in IERS statement, "The sequence of dates of the UTC second markers might be: 2016 December 31 23h 59m 59s, 2016 December 31 23h 59m 60s, 2017 January 1, 0h 0m 0s."

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