The online Wall Street Journal has a World War I Centenary series, and its Daylight-Saving Time page has a photo captioned "A notice informs the British public of a change in time as clocks go back an hour in the first year of daylight saving on Oct. 1, 1916. Topical Press Agency/Getty Images". The interesting thing about the notice is that its transition is off by 14 hours compared to our data. The notice is under a large outdoor hanging clock and says "CHANGE OF TIME. AT 1 P.M. SEPT 30th THIS CLOCK WILL BE SET BACK ONE HOUR TO GREENWICH TIME". Perhaps the clock's operator didn't want to bother changing the clock at the official transition time of 3 A.M. the next day. Fidler S. Daylight-saving time. Wall Street Journal. http://online.wsj.com/ww1/daylight-saving-time