Scientists vote to end leap seconds, redefining how the world keeps time
A new system, called the “leap hour,” will allow Earth’s rotation and official time to fall out of alignment by a full hour
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Today an international group of scientists, diplomats, and timekeepers voted to end the leap second, which has been keeping Coordinated Universal Time (UTC) aligned with the time according to Earth’s rotation (UT1) within one second of difference. The length of a day according to UTC is close to that of UT1 but not exactly the same because our planet’s rotation is irregular. We add a leap second every few years to keep them from drifting too far apart.
But soon the leap second will be replaced with a leap hour, added much more infrequently, which will extend the allowed difference between UT1…
