Photo taken on 235960 GMT on June 30, 2015 shows the moon at Tsavo East National Park near Voi, Kenya. Timekeepers on Tuesday tacked a second to the clock to compensate for a slightly slower Earth rotation. The leap second means the clock will move from 23:59:59 to 23:59:60 before it hits midnight of universal time. (Xinhua/Pan Siwei)