They agree to separate the time of atomic clocks and the rotation of the Earth to avoid global technological chaos
The 28th General Conference on Weights and Measures has decided to eliminate the addition of leap seconds to maintain Coordinated Universal Time (UTC). This change aims to prevent potential technological disruptions by allowing a larger discrepancy between atomic time and astronomical time. The new rules allow the difference between UTC and UT1 (based on Earth's rotation) to grow up to one hour before any adjustments are made, effectively shifting from adding individual leap seconds to potentially implementing a 'leap hour' in the distant future. The decision was accelerated due to recent observations showing Earth’s rotation is speeding up, which could necessitate subtracting a second rather than adding one. Russia was the sole country to oppose this resolution.
International authorities overseeing time measurement have approved a major change to how the world's clocks operate, eliminating the need for periodic adjustments known as leap seconds. This decision was made during the 28th General Conference on Weights and Measures (CGPM), held in Paris, and marks a shift away from aligning atomic time with Earth's rotational time, which has been irregular due to natural factors. The CGPM approved a resolution to make the Coordinated Universal Time (UTC), the standard used globally for timekeeping, continuous from May 20, 2027. This means that leap seconds will no longer be added to keep atomic time synchronized with the Earth's rotation. Instead, the difference between the two systems will be allowed to grow until it reaches one hour, a deviation that could take several centuries to occur. Currently, there are two primary methods for measuring time: one based on atomic clocks, which use the oscillations of atoms to calculate time with high precision, and another based on the Earth's rotation. Atomic time forms the basis of UTC, while the Earth's rotation, influenced by natural phenomena such as tidal forces and internal fluid movements, is slightly irregular. To maintain synchronization, leap seconds were occasionally introduced since 1972, adding an extra second when the discrepancy between atomic and astronomical time approached 0.9 seconds. However, recent observations show that the Earth's rotation has accelerated, raising the possibility of needing a "negative leap second," meaning removing a second from the official time instead of adding one. This scenario could pose risks to critical systems reliant on precise time synchronization, including telecommunications networks, power grids, and financial platforms. The CGPM decided to eliminate this risk by allowing the gap to widen over a much longer period before requiring any adjustment. The decision comes after years of discussion and planning, originally scheduled for implementation in 2035. It was moved forward due to concerns about potential disruptions caused by introducing a negative leap second. Since 1972, 27 leap seconds have been added, with the last one occurring on December 31, 2016. Experts suggest that the acceleration in Earth's rotation is partly due to changes in fluid dynamics within the planet, although human activities such as melting ice caps in Greenland and Antarctica have slowed down the rotation. These factors have led some scientists to advocate more strongly for the removal of leap seconds, arguing that human-induced effects are counteracting the natural acceleration. From May 20, 2027, the UTC will continue without interruption, allowing the difference between atomic and astronomical time to accumulate gradually. This approach ensures the continuity of UTC for many centuries, reducing the complexity and potential risks associated with implementing leap seconds or negative leap seconds. The transition to a continuous UTC system reflects a broader effort to adapt timekeeping standards to modern technological demands, ensuring stability and reliability in systems that rely heavily on accurate time synchronization.
The international community has decided to change the practice of adding leap seconds to keep atomic clocks synchronized with Earth's rotation. For decades, leap seconds were added periodically to account for the slight slowing of Earth’s rotation. However, recent observations show that Earth's rotation has accelerated, potentially requiring the removal of a second, known as a negative leap second, in the future. The Conference Generale des Poids et Mesures (CGPM) approved a resolution to adopt a continuous global time scale, eliminating the need for future leap seconds. This shift aims to simplify timekeeping systems and reduce risks for critical infrastructure reliant on precise timing.
Bias read (Center): The article presents a technical update on international standards for time measurement, focusing on scientific and logistical considerations rather than political positions or ideological framing. It provides balanced information without evident bias toward any side.
The 28th General Conference on Weights and Measures has decided to eliminate the addition of leap seconds to maintain Coordinated Universal Time (UTC). This change aims to prevent potential technological disruptions by allowing a larger discrepancy between atomic time and astronomical time. The new rules allow the difference between UTC and UT1 (based on Earth's rotation) to grow up to one hour before any adjustments are made, effectively shifting from adding individual leap seconds to potentially implementing a 'leap hour' in the distant future. The decision was accelerated due to recent observations showing Earth’s rotation is speeding up, which could necessitate subtracting a second rather than adding one. Russia was the sole country to oppose this resolution.
Bias read (Center): The article reports on a scientific and technical decision regarding timekeeping standards, with no evident political framing, bias, or ideological emphasis. It presents the facts objectively, including the reasons behind the change and the international consensus (with Russia opposing it). There is
Governments have agreed to eliminate the leap second, a practice used to keep atomic clocks aligned with Earth's rotation, and instead implement a leap hour at irregular intervals. This decision aims to prevent potential disruptions caused by the insertion of an extra second, which could lead to technical issues in systems relying on precise timing, such as financial markets and telecommunications. The change reflects growing concerns over the complexities and risks associated with adjusting time at such a granular level. By shifting to a leap hour, authorities hope to simplify timekeeping while maintaining synchronization with astronomical time. The move has been supported by international consensus among timekeeping organizations.
Bias read (Center): The article discusses a scientific and technical adjustment to timekeeping standards, focusing on practical implications rather than political debate. There is no evident ideological framing or bias in the presentation of the issue.
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