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BIPM moves to stop adding leap seconds to UTC

bipm.org 4 min read Editor score 6/10

A 2026 resolution addresses the technical steps needed to preserve UTC continuity, including increasing the allowed difference between UTC and Earth-rotation time. Changes to the time standard can affect systems that depend on precise timestamps.

What

- CGPM Resolution 5 (2026) addresses technical actions needed to ensure UTC continuity.

How

- The resolution cites a rising chance of a first negative leap second, which experts say could disrupt unprepared critical infrastructure.

Why it matters

- Operational software needs a defined UT1-UTC limit; continuous UTC supports synchronization in transport, energy, telecommunications, and space.

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