Question: What famous public holiday celebrates the events that led to the closing of the Grini prison camp? 
Sentence (from "Victory in Europe Day"): Victory in Europe Day, generally known as V-E Day, VE Day or simply V Day, was the public holiday celebrated on 8 May 1945 to mark the formal acceptance by the Allies of World War II of Nazi Germany's unconditional surrender of its armed forces.
Relevant evidence: Yes