German troops on the Eastern Front clear a way through thick snow, January 1917. Image courtesy Imperial War Museum © IWM (Q 86798).
- Heavy fighting occurs on the Eastern Front between the Carpathian Mountains and Focsani; enemy forces advance in the Susitsa valley and near Odobesti. as Russian troops launch a counter-offensive between Focsani and Fundeni, recovering lost ground near Obilesti.
- British airmen on the Western Front conduct a daylight raid south-east of Arras
