{"id":23704,"date":"2025-07-24T11:58:18","date_gmt":"2025-07-24T10:58:18","guid":{"rendered":"http:\/\/dubawa.org\/dir\/?p=23704"},"modified":"2025-07-24T11:58:20","modified_gmt":"2025-07-24T10:58:20","slug":"is-july-9-2025-earths-shortest-day","status":"publish","type":"post","link":"https:\/\/dubawa.org\/dir\/is-july-9-2025-earths-shortest-day\/","title":{"rendered":"Is July 9, 2025, Earth\u2019s shortest day?"},"content":{"rendered":"\n

Claim: Some Facebook users claimed that the Earth\u2019s rotation on Jul. 9, 2025, was the fastest recorded in mankind\u2019s history.<\/strong><\/p>\n\n\n

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Verdict: MISLEADING. Existing records revealed that the shortest day was Jul. 5, 2024, when the Earth\u2019s spin was 1.66 milliseconds shorter. Data from the International Earth Rotation and Reference Systems Services disclosed that Jul. 9, 2025, was 1.37 milliseconds shorter than the usual 24 hours.<\/strong><\/p>\n\n\n\n

Full Text<\/strong><\/h2>\n\n\n\n

On Jul. 9, 2025, a Facebook user named Project Nightfall posted<\/a> that the Earth would rotate faster than usual and the 24-hour duration would be shorter by 1.3 to 1.6 milliseconds. The user claimed the change was due to the moon\u2019s positioning farther from the Earth\u2019s equator. <\/p>\n\n\n\n

As of Jul. 17, 2025, more than 62,000 Facebook users shared the post, gaining over 193,000 reactions and 12,000 comments within the timeframe.<\/p>\n\n\n\n

While Project Nightfall\u2019s post indicated that the date was one of the shortest in modern history, DUBAWA found some Facebook pages claiming it was the shortest day. <\/p>\n\n\n\n

While the phenomenon went viral on social media, many users\u2019 comments, which DUBAWA identified, showed scepticism about the acclaimed record.<\/p>\n\n\n\n

Reacting to Eric Deters for Kentucky and America<\/a>\u2019s reel on Jul. 10, 2025, Michele Wright said, \u201cYesterday [July 9, 2025] was the ninth, and it\u2019s not the shortest day!\u201d.<\/p>\n\n\n\n

David Nunn said, \u201cHow much sleep time will I lose? I\u2019m working [at] night.\u201d<\/p>\n\n\n\n

We also found the claim here<\/a> and here<\/a>.<\/p>\n\n\n\n

Although this difference may seem minuscule, it has implications for understanding the Earth\u2019s behaviour, modern technology, and global systems. Satellite navigation, telecommunications, and international timekeeping depend on precise time measurements. The claim\u2019s impact on humans\u2019 daily living prompted DUBAWA to verify the information.<\/p>\n\n\n\n

Factors influencing Earth\u2019s spin rate<\/strong><\/h2>\n\n\n\n

The Earth spins relatively<\/a> steadily, completing one full turn approximately every 24 hours. This rotation gives rise to the cycle of day and night that governs life on our planet.<\/p>\n\n\n\n

Although the Earth\u2019s rotation<\/a> is mostly stable, it experiences minor variations<\/a> in speed. The subtle change affects<\/a> time calculation on phones, GPS, and satellite signals.<\/p>\n\n\n\n

Several natural factors contribute to these fluctuations, sometimes causing the Earth to spin faster for brief periods.<\/p>\n\n\n\n

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  1. The Moon\u2019s gravitational influence<\/strong><\/li>\n<\/ol>\n\n\n\n

    The Moon\u2019s gravitational pull exerts tidal forces<\/a> on the Earth, affecting both the oceans and the solid Earth. Over long periods, this interaction gradually slows the Earth\u2019s rotation, lengthening the day by about 1.7 milliseconds per century. However, the Moon\u2019s position relative to the Earth can also cause short-term variations. At specific points in its orbit, the Moon\u2019s gravitational pull can slightly accelerate Earth\u2019s spin. <\/p>\n\n\n\n

    Adetola Oniku, a professor of geophysics at Modibbo Adama University, Yola, said that the moon\u2019s gravitational influence helps stabilise the Earth\u2019s axial tilt. \u201cWithout the Moon’s gravity acting as an anchor, the Earth\u2019s tilt and the geographic poles’ position would likely experience chaotic fluctuations,\u201d he said. <\/p>\n\n\n\n

    The Moon’s tidal forces also cause small but cumulative effects, such as the gradual slowing of Earth’s rotation. These millisecond-level changes can only be noticed over a long period. <\/p>\n\n\n\n

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    1. Redistribution of mass on Earth<\/strong><\/li>\n<\/ol>\n\n\n\n

      Oceanic, land, and atmospheric movement, which formed the Earth\u2019s mass, can shift at intervals. Changes in ocean currents and wind patterns can alter how mass is distributed. An instance of such phenomena<\/a> is when large ice sheets melt, causing the water body to spread into the ocean. This moves weight from the poles towards the middle of the Earth, generally making the planet spin a bit slower, making days longer.<\/p>\n\n\n\n

      The planet spins faster when mass moves closer to the Earth\u2019s axis of rotation through an accumulation of ice sheets. Conversely, the spin slows down when mass moves away from the axis. Using satellite gravimetry, scientists detected<\/a> mass ice gain over the Antarctic Ice Sheet between 2021 and 2023.<\/p>\n\n\n\n

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      Mass change recorded in Antarctica between 2002 and 2023. Source: SciTech Daily.<\/em><\/figcaption><\/figure>\n\n\n\n
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      1. Seismic activity and internal Earth movements<\/strong><\/li>\n<\/ol>\n\n\n\n

        Big earthquakes and movements within the Earth\u2019s mantle can move the ground<\/a> and redistribute mass inside the planet, causing tiny, sudden changes in how fast the Earth spins. For example, big earthquakes in Chile (2010)<\/a> and Japan (2011)<\/a> shortened the day by a few microseconds.<\/p>\n\n\n\n

        Zemba Audu, a professor of climatology at Modibbo Adama University, Yola, said human activities such as releasing industrial gases, deforestation, and various other actions alter the atmosphere and contribute to climate change. These activities lead to changes in temperature and rainfall patterns. <\/p>\n\n\n\n

        He revealed that these climate change activities and their consequences can affect Earth\u2019s rotation speed. \u201cThe Earth\u2019s rotation affects the wind\u2019s motion as it moves around on its surface, whether it is a hurricane, a wild wind, or so on. At some point, it could be faster or slower,\u201d he said.<\/p>\n\n\n\n

        As Nigeria rarely experiences earthquakes or hurricanes, Zemba said these consequences often manifest in droughts, heat waves, and excessive rainfall, leading to flooding in the country.<\/p>\n\n\n\n

        Is July 9, 2025, Earth\u2019s shortest day so far?<\/strong><\/p>\n\n\n\n

        Many Facebook pages claimed that the latest incident is the shortest in modern-day humanity\u2019s history. Scientists have documented instances of the Earth spinning faster than average when atomic clocks<\/a> began measuring time with extraordinary precision in the 1960s. Some special tools used to measure include Very Long Baseline Interferometry<\/a> (VLBI), which uses radio antennas worldwide to watch distant stars. Another is Satellite Laser Ranging<\/a> (SLR), which bounces lasers off satellites in space. These tools help scientists track Earth’s movements with great accuracy. Some of the recent days in modern-day records include,<\/p>\n\n\n\n