Setnam Shemar

Principal scientist, time and frequency, UK National Physical Laboratory

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World timekeepers vote to end leap seconds, adopt leap hour

Welcomed the new leap-hour system

Delegates from 69 countries voted on October 15 to abolish the leap second, ending a 54-year system that kept atomic clocks pinned to Earth's uneven rotation. Starting May 20, 2027, the gap between the two can grow as large as one hour before clocks are adjusted.

Updated 1 hour ago