As the sets and costumes make clear, each film is set in the time that it was made—and yet not. The events of Dawn of the Dead (1978) happen weeks after those of Night of the Living Dead, which was released a decade before. The events of Day of the Dead (1985) occur only months after the second film. About roughly three to five years separate the events of the first film and the fourth, Land of the Dead (2005). Diary of the Dead (2007), the fifth film, takes place at the same time as Night of the Living Dead. Survival of the Dead (2010) the sixth film, takes place at the same time as Dawn of the Dead (1978). Fans have speculated that Romero's Dead films are set in two separate timelines. The first trilogy Night of the Living Dead, Dawn of the Dead and Day of the Dead takes place of the zombie apocalypse happening in the 1960s while Romero's second trilogy of Land of the Dead, Diary of the Dead and Survival of the Dead updates the series time setting to the zombie apocalypse happening in present day 2000s instead of the 1960s. However in Empire of the Dead which clearly features technology that was not available in the 1960s, shows a flashback sequence of Barbra surviving her ordeal five years ago at the farmhouse from Night of the Living Dead, suggesting that all six films are set in the same universe. Edit