Horologist David Rooney, is a historian of technology and expert on clocks and timekeeping practices. He is also author of several books including his most recent, About Time: A History of Civilization in Twelve Clocks.

Rooney is involved in running both the Antiquarian Horological Society and the Clockmakers’ Museum, which is the oldest clock and watch museum in the world. He is a Liveryman and Past Steward of the Worshipful Company of Clockmakers and the son of a prominent North East England clockmaker. Rooney lives in London, close to the Greenwich meridian.