The leap second, a measure used to reconcile atomic time with the Earth’s slightly irregular rotation, has been officially abolished by the General Conference for Measures and Weights (CGPM) in Paris. Introduced in 1972, the leap second was added 27 times, most recently in 2016, to account for variations in the Earth’s speed due to factors like melting ice and tidal forces. However, these adjustments posed increasing problems for modern technology, causing network disruptions and even outages for platforms like Reddit and LinkedIn in 2012. Financial markets, reliant on precise time stamps, also faced risks. The decision to eliminate the leap second comes as the Earth’s rotation has recently accelerated, further questioning the need for frequent adjustments. While officially taking effect on May 20, 2027, the change is effectively immediate as no leap seconds were scheduled before then, with the CGPM now adopting a leap hour instead, promising stability for centuries to come.