US EditionEarth Will Spin Faster Marking 2nd Shortest Day in History
GLOBAL, JUL 22 – Earth's rotation is accelerating due to complex factors including gravitational effects and melting polar ice, raising the chance of a negative leap second by 2035, scientists say.
- On Tuesday, July 22, 2025, Earth spins faster, shortening the day by 1.34 milliseconds.
- Since 1972, scientists have observed a trend toward slightly faster days, driven by seasonal and tidal forces, according to Duncan Agnew.
- The International Earth Rotation and Reference Systems Service monitors rotation and decides on adding or subtracting seconds while telescopes fixed on quasars provide a stable frame.
- Timekeepers may implement a first-ever negative leap second by 2029, subtracting a second from atomic time for the first time.
- Because many systems rely on precise time, atomic clocks introduced in 1955 track these discrepancies, which can affect computers, satellites, and telecommunications.
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July 22 will be the second-shortest day of the year, scientists say
STOCK IMAGE/Getty Images (NEW YORK) — Tuesday, July 22 will be the second-shortest day of the year, as Earth completes a full rotation in less time than usual. The planet on Tuesday will experience a shorter rotation than the typical 24 hours, though not by much: 1.34 milliseconds less than usual, according to Timeanddate.com. Typically, we think of the shortest day in the Northern Hemisphere as Dec. 21 or 22, which coincides with the winter sol…
Today Is a Scientifically Short Day - WhoWhatWhy
Today Is a Scientifically Short Day (Maria) The author writes, “Ample sunshine, ice cream, and afternoons at the beach might leave you wishing that summer would never end. Unfortunately, this year the season is speeding by a smidge faster than normal. This July and August, slight fluctuations in Earth’s rotation mean many days have been or will be measurably shorter. Today, July 22, is projected to be about 1.34 milliseconds under the typical 24…
During this summer, the Earth is spinning slightly faster, which has caused the days to be just shorter than usual, according to data from the International Earth Rotation and Reference Systems Service (IERS) and the United States Naval Observatory, collected by the timeanddate.com portal.
Today is a scientifically short day
Ample sunshine, ice cream, and afternoons at the beach might leave you wishing that summer would never end. Unfortunately, this year the season is speeding by a smidge faster than normal. Through July and August of 2025, slight fluctuations in Earth’s rotation mean many of the days have been or will be measurably (though not conspicuously) shorter. Today, July 22, is projected to be about 1.34 milliseconds under the typical 24-hours (86,400 sec…
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