Should global timekeeping agencies adjust for Earth's faster rotation with a “negative leap second�
Earth’s Rotation Speeds Up in July, Shortening Days by Milliseconds
Earth's rotation is speeding up slightly in July 2025, causing multiple days—including July 9 and July 22—to be shorter by about 1.3 to 1.5 milliseconds. Scientists attribute this to gravitational effects from the Moon’s current alignment and shifting mass within Earth’s core, oceans, and crust. Although imperceptible to people, this minor acceleration has serious implications for global timekeeping, GPS systems, and satellite synchronization. Experts warn that if this trend continues, it may require the world’s first-ever “negative leap secondâ€â€”removing a second from the global atomic clock to stay in sync with Earth’s spin. The discussion highlights how even tiny changes in Earth’s dynamics can ripple through modern technology. Source: https://timesofindia.indiatimes.com/science/earths-rotation-speeds-up-causing-shorter-days-in-july-due-to-moons-new-alignment-on-these-dates/articleshow/122343592.cms
Options
- Yes, to maintain precision
- No, the impact is too small
- Only if it continues long-term
- Not sure