Then in the month of Nisan, in the twentieth year of King Artaxerxes, when wine was brought to me, I took the wine and gave it to the king. Previously I had not been depressed in the king's presence.

In the first month (that is, the month of Nisan), in the twelfth year of King Ahasuerus' reign, pur (that is, the lot) was cast before Haman in order to determine a day and a month. It turned out to be the twelfth month (that is, the month of Adar).