Today, the 28th* of Nisan, Jews around the world are marking Yom Ha’shoah (Officially Yom Ha’zikaron La’shoah V’la’g'vurah, which translates to The Day of Memorial for the Holocaust and the Heroism, generally shortened to Yom Ha’shoah). In Israel, the day is marked by official ceremonies, flags at half mast and, most famously, by a siren marking a moment of silence during which traffic comes to a standstill.
When World War II ended and the world was finally clearly aware of the incredible devastation wrought in Europe, there were no words. While mourning for their own nation’s soldiers, the world was faced with accepting the fact that the Nazis had purposefully and systematically murdered six million Jewish men, women and children as well as several million others whom they classified as lesser human beings.
The term “Holocaust” is a word of Greek origin used to describe massacres. As it came to be applied to the events in Europe in the 1940s, the term emerged as the name for this highly specific genocide. This was strengthened by the release of the 1978 NBC mini-series of the same title.
In Hebrew, the Holocaust is referred to as Ha’shoah. Shoah means calamity. Similar to the term Holocaust, the term shoah gained further usage after the release of the 1985 French documentary entitled“Shoah.” The film condensed over 300 hours worth of interviews into 9.5 hours and brought the hard-hitting facts of the Holocaust into reality.
In traditional communities, the events of the Holocaust are referred to as "Churban Europe" or "the Churban," a term which parallels the destruction of the Torah learning centers in Europe with the destruction of the Holy Temple. Many traditional communities also mark a day of mourning for the victims of the Holocaust on an already established day of universal mourning, either the Tenth of Tevet or the Ninth of Av.
*Although Yom Hashoah's official date is 27 Nisan, it is observed on the 28th when the 27th is a Sunday.