'Year' in the Bible

The words of Nehemiah son of Hacaliah:During the month of Chislev in the twentieth year, when I was in the fortress city of Susa,

During the month of Nisan in the twentieth year of King Artaxerxes, when wine was set before him, I took the wine and gave it to the king. I had never been sad in his presence,

Furthermore, from the day King Artaxerxes appointed me to be their governor in the land of Judah—from the twentieth year until his thirty-second year, 12 years—I and my associates never ate from the food allotted to the governor.

When the surrounding peoples bring merchandise or any kind of grain to sell on the Sabbath day, we will not buy from them on the Sabbath or a holy day. We will also leave the land uncultivated in the seventh year and will cancel every debt.

We have cast lots among the priests, Levites, and people for the donation of wood by our ancestral houses at the appointed times each year. They are to bring the wood to our God’s house to burn on the altar of the Lord our God, as it is written in the law.

We will bring the firstfruits of our land and of every fruit tree to the Lord’s house year by year.

While all this was happening, I was not in Jerusalem, because I had returned to King Artaxerxes of Babylon in the thirty-second year of his reign. It was only later that I asked the king for a leave of absence