 Well, this summer, millions of people have experienced the fact that climate change is making our days hotter, but new research shows that it is also making them longer. Well, the study published in the journal Proceedings of the National Academy of Sciences found that climate change actually added between 0.3 and 1 millisecond per century to the length of a day. Since 2000, that rate has accelerated to 1.3 milliseconds, which is faster than has ever happened before, according to researchers.