Year zero
Historians have never included a year zero. This means that between, for example, and , there are 999 years: 500 years BC, and 499 years AD preceding 500. In common usage "anno Domini" 1 is preceded by the year 1 BC, without an intervening year zero. Neither the choice of calendar system (whether Julian or Gregorian) nor the era ("Anno Domini" or Common Era) determines whether a year zero will be used. If writers do not use the convention of their group (historians or astronomers), they must explicitly state whether they include a year 0 in their count of years, otherwise their historical dates will be misunderstood.
Year Zero: The Silent Death of Cambodia
In a 2007 speech, "Freedom Next Time: Resisting the Empire", Pilger described his experience with executives of the American Public Broadcasting Service (PBS). They refused to screen "Year Zero", which, according to Pilger, has never been broadcast in the USA.