Science ❯Earth Sciences ❯Geophysics

Earth Rotation

Length of Day Timekeeping Time Measurement Day Length Variations

Earth’s Rotation Breaks Records with Successive Millisecond-Short Days

Atomic-clock data confirm July 9 and 10 as the shortest days of 2025, forecasting July 22 to shave another 1.34 ms from a solar day.

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

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