On January 27 each year, the United Nations (UN) remembers the Holocaust that affected many people of Jewish origin during World War II. This day is called the International Day of Commemoration in Memory of the Victims of the Holocaust. It also commemorates when the Soviet troops liberated the Nazi concentration and death camp Auschwitz-Birkenau in Poland on January 27, 1945.

The Holocaust, or Shoah (Sho’ah, Shoa), is the term used to describe the deliberate murder and desecration of millions of people prior to and during World War II in Germany and German occupied areas in Europe. Many of them were Jewish but the Roma people, Soviet civilians and prisoners of war, ethnic Poles, people with disabilities, homosexuals and political and religious opponents were also killed. Many people died in concentration and death camps spread across Nazi-occupied Europe. One of the most notorious camps was Auschwitz-Birkenau, near Oświęcim, Poland. More than one million people died in Auschwitz-Birkenau before Soviet troops liberated it on January 27, 1945.