This shows how often the major events of the last hundred years have been spaced by thirty years.
The protest that resulted from the Iranian election shocked the world. Did you ever think you'd see the Supreme Leader humbled in public? That's what seemed to happen on CNN via Twitter. He begged the protesters to go home. They didn't. Even now, although many have been imprisoned and tortured, the protest continues.
It's ironic how many times the number thirty appears in the 20th century and now into this one. That has not been true of any other modern century except the 16th, during the Reformation. See the chart below for details.
The number 30 is important in the Bible: David took the throne at age 30, Jesus began his ministry at that age, and Judas accepted 30 pieces of silver to betray Jesus.
Add 30 years to the left side of this chart and you get the events on the right side.
