Yom Ha Sho’ah is a holiday of remembrance for the events of the Holocaust.
Most Jewish communities hold a solemn ceremony on this day, but there is no institutionalized ritual accepted by all Jews. Lighting memorial candles and reciting the Kaddish—the prayer for the departed—are common.
In Isreal, Yom HaShoah is a state holiday. Flags on public buildings are flown at half-mast. At 10:00 a.m., an air raid siren sounds throughout the country and almost everyone stops what they are doing, including motorists who stop their cars in the middle of the road, for two minutes of silent reflection as the siren is sounded