January 27 is an official day of remembrance in Germany. What does this day commemorate?

Question

Accepted Answer

the victims of National Socialism (Day of the liberation of the Auschwitz extermination camp). January 27 is the Day of Remembrance for the Victims of National Socialism. On this day in 1945, the Auschwitz concentration camp was liberated. The day is internationally known as Holocaust Remembrance Day.

Der 27. Januar ist in Deutschland ein offizieller Gedenktag. Woran erinnert dieser Tag?