'Year of' in the Bible

Now I was cupbearer to the king. And it came to pass in the month Nisan, in the twentieth year of Artaxerxes the king, when wine was before him, that I took up the wine, and gave it to the king. Now I had not [formerly] been sad in

Moreover from the time that I was appointed to be their governor in the land of Judah, from the twentieth year even to the thirty-second year of Artaxerxes the king, [that is], twelve years, I and my brothers have not eaten the bre

But in all this [time] I was not at Jerusalem, for in the thirty-second year of Artaxerxes king of Babylon I went to the king. And after certain days I asked leave of the king,