This July 22nd will be one of the shortest days of the year due to this strange cause

On July 22, 2025, a phenomenon will be observed that will mark the second shortest day of the year , with a reduction of approximately 1.34 milliseconds in the length of the day. This is due to a slight acceleration in the Earth's rotation , as indicated by records from IERS and various observatories.

Planet Earth typically completes one rotation in a 24-hour period, which is equivalent to 86,400 seconds. However, natural factors, such as atmospheric phenomena, Earth's core movements, and ocean currents, can cause slight variations in this time.

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In 2025, three days were observed to be remarkably short: July 9 and 22, as well as August 5. The shortest day was July 10, with a duration of -1.36 ms, closely followed by July 22, which was estimated at -1.34 ms.

The event occurs when the Moon is almost at its greatest distance from the Earth's equator , which slightly modifies the rotational inertia and results in a more accelerated rotation.

Specialists such as Leonid Zotov point to this alignment as the main cause, although other internal factors could also play a role.

Although virtually invisible in everyday life, these fluctuations affect essential systems such as GPS , communications networks, and atomic clocks , which depend on extreme time precision.

Authorities are closely monitoring the figures to determine whether it is necessary to introduce a "negative leap second," an adjustment that has never been made before to correct the imbalance.