leap second

The International Bureau of Weights and Measures has adopted a resolution to stop adding leap seconds to Coordinated Universal Time, ending a decades-old practice of occasionally inserting an extra second to keep atomic time aligned with Earth's rotation. The decision follows years of debate among metrologists, tech companies and standards bodies, who have argued that irregular one-second adjustments cause failures in computing and navigation systems. A replacement mechanism for reconciling time with the slowing of Earth's rotation remains under discussion.