'Year' in the Bible

he gave a banquet in the third year of his reign for all his officials and servants. The army of Persia and Media and the nobles and officials of the provinces were in his presence

Esther was taken to King Ahasuerus, to his {palace}, in the tenth month that is Tebeth in the seventh year of his reign.

In the first month, that [is], the month of Nisan, in the twelfth year of King Ahasurus, he cast pur--that [is], the lot--before the presence of Haman {for the day and for the month}, until the twelfth month, that [is], the month of Adar.

to impose on them to keep the fourteenth day of the month of Adar, and the fifteenth [day], {every year},

the Jews established and adopted [it] for themselves and for their offspring, and for all who joined them. They did not neglect {to observe} these two days every year as it was written and appointed to them.