'Eighth' in the Bible

In the eleventh year in the month of Bul, that is, the eighth month, the house was finished [according] to all his specifications and [according] to all his plans. He had built it in seven years.

On the eighth day, he sent the people away, and they blessed the king, and they went to their tents rejoicing and {in good spirits} because of all the goodness that Yahweh had shown to David his servant and to Israel his people.

Jeroboam also inaugurated a religious feast in the eighth month on the fifteenth day of the month, like the religious feast which was in Judah, and he offered [sacrifices] on the altar. Thus he did in Bethel, by sacrificing to the calves that he had made; and he placed in Bethel the priests of the high places which he had made.

He offered [sacrifices] on the altar which he had made in Bethel on the fifteenth day of the eighth month which his heart had devised. He inaugurated a religious feast for the {Israelites}, and he went up to the altar to offer incense.