'Month' in the Bible

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

In the first month, which 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, and chose the twelfth month, which is the month Adar.

Then the king's scribes were called in on the first month, on the thirteenth day of the month; and all that Haman commanded was written to the king's satraps, and to the governors who were over every province, and to the princes of every people, to every province according its writing, and to every people in their language. It was written in the name of King Ahasuerus, and it was sealed with the king's ring.

Letters were sent by couriers into all the king's provinces, to destroy, to kill, and to cause to perish, all Jews, both young and old, little children and women, in one day, even on the thirteenth day of the twelfth month, which is the month Adar, and to plunder their possessions.

Then the king's scribes were called at that time, in the third month Sivan, on the twenty-third day of the month; and it was written according to all that Mordecai commanded to the Jews, and to the satraps, and the governors and princes of the provinces which are from India to Ethiopia, one hundred twenty-seven provinces, to every province according to its writing, and to every people in their language, and to the Jews in their writing, and in their language.

on one day in all the provinces of King Ahasuerus, on the thirteenth day of the twelfth month, which is the month Adar.

Now in the twelfth month, which is the month Adar, on the thirteenth day of the month, when the king's commandment and his decree drew near to be put in execution, on the day that the enemies of the Jews hoped to conquer them, (but it was turned out the opposite happened, that the Jews conquered those who hated them),

The Jews who were in Shushan gathered themselves together on the fourteenth day also of the month Adar, and killed three hundred men in Shushan; but they didn't lay their hand on the spoil.

This was done on the thirteenth day of the month Adar; and on the fourteenth day of that month they rested and made it a day of feasting and gladness.

But the Jews who were in Shushan assembled together on the thirteenth and on the fourteenth days of the month; and on the fifteenth day of that month, they rested, and made it a day of feasting and gladness.

Therefore the Jews of the villages, who live in the unwalled towns, make the fourteenth day of the month Adar a day of gladness and feasting, a good day, and a day of sending presents of food to one another.

to enjoin them that they should keep the fourteenth and fifteenth days of the month Adar yearly,

as the days in which the Jews had rest from their enemies, and the month which was turned to them from sorrow to gladness, and from mourning into a good day; that they should make them days of feasting and gladness, and of sending presents of food to one another, and gifts to the needy.