Use it wisely...
https://news.google.com/news/amp?caurl=https%3A%2F%2Fwww.washingtonpost.com%2Famphtml%2Fnews%2Fcapital-weather-gang%2Fwp%2F2016%2F12%2F28%2Fon-dec-31-an-extra-leap-second-will-be-added-to-our-universal-clocks-because-waves%2F#pt0-40721
