How do the time periods between the original novel and radio versions of The Wars of the World differ?

The radio version was set on the day it was broadcast in the 1930s, while the novel was set in the late 1800s.

The War of the Worlds (1898) is a science fiction novel by H. G. Wells. It describes the memoirs of an unnamed narrator in the suburbs of Woking, Surrey, England who recounts an invasion of Earth by an army of Martians with military technology far in advance to human science. It is said to be the first story that details a human conflict with, and overall defeat by, an extraterrestrial race.

Following its publication, The War of the Worlds rapidly entered popular culture. Through the 20th and 21st centuries, the novel has been adapted into a number of different mediums, including radio, television and film. These have been produced with varying degrees of faithfulness towards the original text, with many of the more famous adaptations, such as Orson Welles' 1938 radio adaptation and the 2005 film directed by Steven Spielberg, choosing to set the events in a contemporary setting. In addition, many adaptations, including both of the above, have relocated the plot from its original setting of England in favour of the United States. The most recent adaptation of this type was produced in Canada and broadcast on Britain's BBC (Autumn, 2013) and BBC America (Summer 2014) for the centenary of World War I. It posits the Martian invasion as The Great Martian War 1913-1917, with the Martians invading Earth, first falling on Germany, and then expanding their war on mankind throughout Western Europe.