Now that you have metioned Shani, here are some facts :
Shani takes about 30 years to go around the Sun. It slightly goes more or less sometimes. One cannot count exact 30 years.
60 years ago, in 1947-48, we all know whast happened in India.
30 years ago, in 1977 also we all know what happened in India.
Both these events had a major impact on India as a nation.
Similar events were anticipated in 2007.... which got delayed and have taken place in 2008. The impact of these events is on the entire nation.
Now, we can expect next event in 2038
Saturn in Leo, is not at all good for India, astrologically. But that is a separate topic.
Cheers!