Over Britain... Two RAF Spitfires shoot down 2 RAF Hurricanes in error during the first air raid warning, which turns out to be false. The incident becomes known as the "Battle of Barking Creek."

In Poland...  The German 10th Army (Reichenau) continues to lead the advance, having already penetrated to the east of Lodz. Armored spearheads of the German forces capture Tomaszow and Kielce, southwest of Warsaw. Krakow is taken by troops of the German 14th Army (List). The Polish government and supreme command leave Warsaw. The government is relocating to the region of Luck-Kremieniec, while the supreme command moves to Brzesko on the Bug River. The Polish supreme command issues orders for all Poles capable of fighting, in and out of uniform, to retire to the line of the Narew, Vistula and San rivers. Meanwhile, Hitler visits the headquarters of the German 19th Panzer Corps (Guderian), on the northeastern front.

In Pretoria... The government of South Africa, lead by Prime Minister Jan Christian Smuts, declares war on Germany.

In Madrid... The Spanish government, led by dictator General Franco, declares its neutrality. Franco also makes a secret pledge to support the Axis cause.

In Britain... The Royal Navy forms the Northern Patrol consisting of 8 cruisers. The first British eastern convoy sails.

In France... A 72-hour working week is introduced in the munitions industry. 

In the Soviet Union... The German passenger liner, Bremen, (52,000 tonnes) arrives at Murmansk, in northern Russia, from New York.

In Baghdad... The Iraqi government breaks off diplomatic relations with Germany.