'Month' in the Bible

Shallum, the son of Jabesh, became king in the thirty-ninth year of Uzziah, king of Judah; and he was ruling in Samaria for the space of one month.

Now in the ninth year of his rule, on the tenth day of the tenth month, Nebuchadnezzar, king of Babylon, came against Jerusalem with all his army and took up his position before it, building earthworks all round the town.

Now on the ninth day of the fourth month, the store of food in the town was almost gone, so that there was no food for the people of the land.

Now in the fifth month, on the seventh day of the month, in the nineteenth year of Nebuchadnezzar, king of Babylon, Nebuzaradan, the captain of the armed men, a servant of the king of Babylon, came to Jerusalem;

But in the seventh month, Ishmael, the son of Nethaniah, the son of Elishama, of the king's seed, came with ten men and made an attack on Gedaliah, causing his death and the death of the Jews and the Chaldaeans who were with him at Mizpah.

And in the thirty-seventh year after Jehoiachin, king of Judah, had been taken prisoner, in the twelfth month, on the twenty-seventh day of the month, Evil-merodach, king of Babylon, in the first year of his rule, took Jehoiachin, king of Judah, out of prison;