2016 really was a big year

You thought that 2016 was a bad year? The timelords at the International Earth Rotation and Reference Systems Service announced some months ago there would be an extra second added to the end of 2016, so the clocks read 23:59:60 on 31 December and we all got an extra second. Such leap seconds are occasionally need to ensure Coordinated Universal Time, the official measure of time, stays in sync with changes in the Earth’s rotation.