CGPM Resolution 5 ends leap seconds for UTC

The General Conference on Weights and Measures has passed a resolution to permanently eliminate leap seconds for Coordinated Universal Time starting May 20, 2027. The author explains that this decision avoids the severe technical risks associated with a potential negative leap second caused by the Earth's accelerating rotation. Consequently, critical industries and software systems will no longer need to implement complex and error-prone leap second workarounds. Open article →