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Earth Rotation

Time Measurement Length of Day Timekeeping Climate Change Effects Climate Change Day Length Variations Day Length Lunar Influence Impact on Climate Daylight Duration

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

Ruling out a 2025 leap second, international timekeepers prepare protocols for a possible negative adjustment by 2029.

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