Earth’s Days Getting Longer, Slower: Study Adan Salazar Posted on December 7, 2016 Posted in Aggregated No Comments Over past 27 centuries, average day has lengthened at a rate of about +1.8 milliseconds (ms) per century… Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email