On the Western Front... The US 8th Corps (part of US 3rd Army) launches attacks northward, against the German 5th Panzer Army, from a line between Bastogne and St. Hubert with Houffalize as the objective. Meanwhile, elements of German 5th Panzer Army launch another unsuccessful attempt at cutting the American corridor into Bastogne and capture the town. 

On the Eastern Front... In Hungary, Soviet forces of 2nd and 3rd Ukrainian Fronts are engaged in fighting in and around Budapest.

In Washington... General Groves, head of the Manhattan Project, reports that the first two atomic bombs should be ready by August 1, 1945.