'Year' in the Bible

In the third year of his reign, he made a feast unto all his princes and his servants; the power of Persia and Media, the nobles and princes of the provinces, being before him:

During the year before each young woman’s turn to go to King Ahasuerus, the harem regulation required her to receive beauty treatments with oil of myrrh for six months and then with perfumes and cosmetics for another six months.

So Esther was taken unto king Ahasuerus into his house royal in the tenth month, which is the month Tebeth, in the seventh year of his reign.

In the first month, that is, the month Nisan, in the twelfth year of king Ahasuerus, they cast Pur, that is, the lot, before Haman from day to day, and from month to month, to the twelfth month, that is, the month Adar.

He ordered them to celebrate the fourteenth and fifteenth days of the month Adar every year

The Jews ordained, and took upon them, and upon their seed, and upon all such as joined themselves unto them, so as it should not fail, that they would keep these two days according to their writing, and according to their appointed time every year;