Answer:
There have been three (3) prominent countries to embark on a Five Year Plan in the 20th century. As I am unsure as to which you refer to, I will give the dates for all three.
Soviet Union
Under Stalin, the U.S.S.R wanted to catch up to the West in terms of production and so embarked on several Five Year Plans. The Second one began in the year 1933 and went till 1937.
China
The Chinese copied the Soviet Union in making Five Year plans but never stopped. There has been a Five Year plan since 1953 with the nation being on its fourteenth plan now. The second plan however, lasted from 1958 to 1962.
India
India also emulated this strategy and came up with several Five Year plans with the second running from April 1956 to March 1961.
