Nebuchadnezzar's 2nd year
You redefine his 20th year as his 2nd year by adding the words 'AS WORLD RULER' to Daniel 2:1.
How Daniel 2:1 actually reads
And in the second year of the kingship of Nebuchadnezzar, Nebuchadnezzar dreamed dreams; and his spirit began to feel agitated, and his very sleep was made to be something beyond him.