- The Eastern Extension Telegraph Company offers discounted rates for Christmas cables to and from soldiers serving overseas. Cables To Soldiers
- The Allies send a Note to the Greek government demanding the demobilisation of the army
- Enemy forces cross the Jalomitsa River, north-east of Bucharest on the Eastern Front
- Allied forces conduct two air-raids on the Belgian port of Zeebrugge
- The Italian battleship Regina Margherita collides with two mines laid by the German submarine UC-14 in heavy seas off Valona in southern Albania. 675 men are killed, just 270 survive.
Italian battleship Regina Margherita on speed trials, 1904. Image courtesy Marine Engineering, 9, 1904, New York.
