(ABC 6 News) – Saturday marks International Holocaust Remembrance Day. The anniversary of the liberation of the Auschwitz-Birkenau Concentration Camp.

The day was created by the United Nations General Assembly in 2005 as a way to remember the millions of victims of Nazi mistreatment and killing during some of Europe’s darkest days. This, coming after a special session to mark the then-60th anniversary of the liberation of Nazi concentration camps and the end of the Holocaust.

This is different than Yom Hashoah, or Holocaust Remembrance Day. This is held in late April or early May based on the 27th day of Nisan on the Hebrew calendar. Marking the anniversary of the Warsaw ghetto uprising. In Israel, it’s known as a national memorial day.

“Well, I think that every nation is susceptible to fascism, and letting history repeat is the worst crime humanity can commit. Because if we already learned something, we’ve already seen destruction.

“Those things can be repeated and I think we have to learn from our own inhumanity if we’re ever going to be able to discover our humanity,” said Rabbi Michelle Werner at the B’nai Israel Synagogue in Rochester.

One way B’nai remembers victims is with Bar or Bat Mitzvahs. A coming of age celebration for when someone turns 13. Each child shares their Mitzvah with a child victim of the Holocaust who didn’t have one of their own.

Werner says the reason the synagogue doesn’t have a service for International Holocaust Remembrance Day is because the congregation remembers based on the Hebrew calendar.