The Earth is predicted to make its fastest rotations on July 9, July 10, July 22 and August 5, according to a Time and Date article.

But Earth’s rotation could change by a millisecond — which is .001 seconds — or two every day. Also, the orbit of the moon can have an effect on how fast the Earth spins.

Earth's fastest rotations — and shortest days — are predicted for this summer. Here's what to know. By Alexia Partouche, Staff writer July 11, 2025 ...

Earth’s orbit around the Sun isn’t a perfect circle—it’s slightly elliptical. Each year, around July 2 or 3, Earth reaches its farthest point from the Sun, known as aphelion.

On July 9, July 22 and Aug. 5, the position of the moon is expected to affect Earth's rotation so that each day is between 1.3 and 1.51 milliseconds shorter than normal," Arthur wrote.

Called aphelion, the sun at that moment will be 94,502,939 miles (152,087,738 km) from our Earth (measured from center to center), or 3,096,946 miles (4,984,051 km) farther as compared to when the ...