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leap second

News about leap second: events, facts and developments on tafs uz.

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Technology

International conference abolishes the addition of leap seconds from 20 May 2027

The General Conference on Weights and Measures, at its 28th meeting in Versailles on 15 October 2026, decided to stop adding leap seconds to UTC from 20 May 2027. The reason is technical risks, including the possible first-ever 'negative' leap second due to the acceleration of the Earth's rotation. The divergence between UTC and astronomical time will be allowed to reach one hour.

Sardor Qodirov
4 min read
Science

From May 20, 2027, leap seconds will no longer be used to adjust Coordinated Universal Time

The International Bureau of Weights and Measures announced that from May 20, 2027, leap seconds will no longer be added to Coordinated Universal Time (UTC), a practice introduced in 1972. The reason was the acceleration of Earth's rotation, which for the first time could have required removing a second rather than adding one, threatening disruptions to computer systems.

Madina Usmonova
2 min read