'Year' in the Bible

Words of Nehemiah son of Hachaliah. And it cometh to pass, in the month of Chisleu, the twentieth year, and I have been in Shushan the palace,

And it cometh to pass, in the month of Nisan, the twentieth year of Artaxerxes the king, wine is before him, and I lift up the wine, and give to the king, and I had not been sad before him;

Also, from the day that he appointed me to be their governor in the land of Judah, from the twentieth year even unto the thirty and second year of Artaxerxes the king -- twelve years -- I, and my brethren, the bread of the governor have not eaten:

and the peoples of the land who are bringing in the wares and any corn on the sabbath-day to sell, we receive not of them on the sabbath, and on a holy day, and we leave the seventh year, and usury on every hand.

And we have appointed for ourselves commands, to put on ourselves the third of a shekel in a year, for the service of the house of our God,

And the lots we have caused to fall for the offering of wood, among the priests, the Levites, and the people, to bring in to the house of our God, by the house of our fathers, at times appointed, year by year, to burn on the altar of Jehovah our God, as it is written in the law,

and to bring in the first fruits of our ground, and the first fruits of all fruit of every tree, year by year, to the house of Jehovah,

And during all this I was not in Jerusalem, for in the thirty and second year of Artaxerxes king of Babylon did I come unto the king, and at the end of days I have asked of the king,