The science behind why the Earth will spin just a little bit faster on July 9, July 22, and August 5, this year.

As for when this three-day event will happen, there are three days this summer when the moon will be around its furthest distance from Earth’s equator, resulting in the slight increase in Earth’s rotational speed. Scientists are predicting that this will happen on July 9, July 22 and Aug. 5.

Earth is expected to spin faster than usual in the upcoming weeks, leading to slightly shorter days, scientists report, according to Live Science. On July 9, July 22, and August 5, 2025, the position of the moon will influence Earth's rotation, making each day between 1.3 and 1.51 milliseconds shorter than the standard 24 hours.