Surrender of Warsaw to Nazi Germany in World War II (September 27), on September 27, 1939, marked a significant event at the outset of World War II. Following the German invasion of Poland on September 1, 1939, Warsaw endured nearly three weeks of intense siege and bombardment. The civilian population faced severe shortages of food, water, and medical supplies, and thousands lost their lives. It is estimated that around 20,000 civilians were killed during the siege and bombing of the city. Ultimately, after prolonged resistance by Polish forces and worsening humanitarian conditions, Warsaw's authorities decided to surrender. This led to the complete occupation of the Polish capital by German forces and represented a turning point in the early stages of the war. After the surrender, German troops took full control of the city, and many buildings and urban infrastructure suffered extensive damage. The entry of German forces into Warsaw and the city's surrender marked the beginning of a period of occupation and widespread repression in Poland, leaving a profound impact on the country's history and its people. This event remains a prominent example of the military and human consequences of World War II. The observance of this date in some calendars serves as a reminder of the historical significance and far-reaching effects of the event. This date was added to the Gregorian calendar after the 1939 surrender of Warsaw to Nazi Germany, in order to commemorate the historical importance and consequences of this event.
