Science1 hOctober 14, 2026, 23:30

Time lords set to vote on ending leap seconds in UTC

The General Conference on Weights and Measures looks set to end leap seconds by allowing UTC to drift up to one hour from astronomical time UT1, up from 0.9 seconds. The change would take effect on May 20, 2027, sparing computer systems awkward adjustments for centuries.

The Register

Open source

Time lords set to vote on ending leap seconds in UTC

27 leap seconds have been added to UTC since 1972
Allowed UTC-UT1 difference would grow from 0.9 seconds to one hour
Experts put 30% odds on a negative leap second by 2035
The change would take effect on May 20, 2027

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