The end of the second world war.
The various camps were liberated by the Allies, and the Allied victory over Germany put a definitive end to the Holocaust.
The Holocaust ended as individual camps were liberated and finally with the military defeat of Nazi Germany.
Some were put on trial and convicted of various crimes. A few were hanged for murder.
America fought Germany for the end of the Holocaust, you can learn more if you research more about the Holocaust end and WW2.
You could argue that the Holocaust was the start of the modernity.
A holocaust can also be called genocide.
They died because of the concentration camps that Hitler and his Nazi group put them in.
no doubt, the end of the Holocaust.
The UN did not exist at the time. For the rest of the answer see the related question: How did the Holocaust end?
The National Convention
The Holocaust ended May 8, 1945 which is around spring.
It did not end any place. When the camps and territories were liberated, the Holocaust ended there, when Germany surrendered it ended in the last places.