Science ❯Earth Sciences ❯Geophysics

Earth Rotation

Time Measurement Timekeeping Length of Day Day Length Variations

Earth to Record Third-Shortest Day on Aug. 5 as Timekeepers Plan First Negative Leap Second

Rapid, unexplained shifts in Earth’s rotation are complicating coordination of global time standards.

Earth Sets Second-Shortest Day of 2025 as Spin Continues to Accelerate

Earth Logs 1.34-Millisecond Day, Its Second-Shortest on Record

Earth's Spin Breaks Short-Day Records as Timekeepers Halt 2025 Leap Second

Three Record-Short Days Ahead as Earth’s Spin Accelerates