Yom HaShoah is a day of remembrance for the six million Jewish people who died in the Holocaust, and a range of events take place. In Israel, it is a national memorial day. On the evening beforehand, there is a state ceremony at the Holocaust Martyrs' and Heroes Authority, Yad Vashem. At 10am on the day of Yom HaShoah, air-raid sirens are sounded and people stop what they are doing to think of and pay respect to those who died. Places of public entertainment are closed and flags on public buildings are flown at half mast.