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Shortest day in 2025
August 8 , 2025
17 hrs 0 min
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- August 5, 2025, was shorter by 1.34 milliseconds than the standard 24 hours.
- The change was due to the shifts in the Earth’s inner core and fluctuations in atmospheric and oceanic pressure.
- When the core slows down, the outer layers spin slightly faster to conserve the angular momentum.
- Ocean currents, winds, and lunar gravity also influence Earth’s rotation and day length.
- This shortening does not affect daily life but impacts systems that rely on precise timekeeping, like atomic clocks and the Global Positioning System.
- The Earth’s shortest day so far was July 5, 2024, when rotation finished 1.66 milliseconds early.
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