Stefan Starzyński, Mayor of the capital city of Warsaw, is nominated as Civilian Commissar at the Command of the Defense of the Capital.
The beginning of the defense of Warsaw organized by Gen. Walerian Czuma. Gen. Juliusz Rómmel (whose Łódź Army had been defeated) takes the command of the newly formed Warszawa Army, its tasks including the defense of the capital city. A German Panzer Division reaches the outskirts of Warsaw in the region of Ochota and tries to seize the city on the spot.
The Ciepielów Massacre. A Wermacht unit (from 15th Motorized Infantry Regiment, 29th Motorized Infantry Division) murders several dozen Polish POWs.