'Month' in the Bible

Shallum the son of Jabesh became king in the thirty-ninth year of Uzziah (Azariah) king of Judah, and he reigned one month in Samaria.

Now in the ninth year of Zedekiah’s reign, on the tenth day of the tenth month, Nebuchadnezzar king of Babylon came, he with all his army, against Jerusalem, and camped against it and built siege works surrounding it.

On the ninth day of the fourth month the famine [caused by the siege] was severe in the city; there was no food for the people of the land.

On the seventh day of the fifth month in the nineteenth year of King Nebuchadnezzar of Babylon, Nebuzaradan, captain of the bodyguard, 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 royal family [who had a claim to be governor], came with ten men and struck and killed Gedaliah and the Jews and the Chaldeans who were with him at Mizpah.

Now it came about in the thirty-seventh year of the exile of Jehoiachin king of Judah, on the twenty-seventh day of the twelfth month, that Evil-merodach king of Babylon, in the year that he became king, showed favor to Jehoiachin king of Judah and released him from prison;