The First Five-year Plan was launched on 1st April, 1951 and it ended on 31st March, 1956.
Various one year plans initiated between the five year plans are :
1. Three annual Plans From 1st April 1966 to March 31st 1969.
2. One year Plan from April 1st 1979 to March 31st 1980.
3. Two yearly plans were decided from 1st April, 1990 to 31st March, 1992.