International Holocaust Remembrance Day, is an international memorial day on 27 January commemorating the victims of the Holocaust. It commemorates the genocide that resulted in the death of an estimated 6 million Jews, 1 million Roma, 250,000 mentally and physically disabled people, and 9,000 homosexual men by the Nazi regime and its collaborators. It was designated by the United Nations General Assembly resolution 60/7 on 1 November 2005 during the 42nd plenary session. The resolution came after a special session was held earlier that year on 24 January 2005 during which the United Nations General Assembly marked the 60th anniversary of the liberation of theNazi concentration camps and the end of the Holocaust.

On 27 January 1945, Auschwitz-Birkenau, the largest Nazi death camp, was liberated by Soviet troops.