Answer:
As is the case with most fables, Animal Farm is set in an unspecified time period and is largely free from historical references that would allow the reader to date the action precisely. It is fair to assume, however, that Orwell means the fable to be contemporaneous with the object of its satire, the Russian Revolution (1917–1945). It is important to remember that this period represented the recent past and present at the time of writing and that Orwell understands the significance of the story’s action to be immediate and ongoing rather than historical.