August 5 could be the shortest day ever — shorter than 24 hours! Know why

On August 5, 2025, Earth is expected to experience a slightly shorter day, approximately 1.34 milliseconds less than 24 hours. This phenomenon is attributed to changes within the Earth's core and atmospheric fluctuations. While imperceptible to humans, this acceleration could impact precise timekeeping systems like atomic clocks and GPS networks, requiring adjustments to maintain synchronization.