On the fifteenth day of the eighth month, a month of his own choosing, Jeroboam offered sacrifices on the altar he had set up in Bethel. So he ordained a feast for the Israelites, offered sacrifices on the altar, and burned incense.
We have here the beginning of the reign of Jeroboam. He built Shechem first and then Penuel - beautified and fortified them, and probably had a palace in each of them for himself (Kg1 12:25), the former in Ephraim, the latter in Gad, on the other side Jordan.
Commenting on 1 Kings 12:25-33
He offered upon the altar - Jeroboam probably performed the functions of high priest himself, that he might in his own person condense the civil and ecclesiastical power.
1Ki 12:32-33 Jeroboam also transferred to the eighth month the feast which ought to have been kept in the seventh month (the feast of tabernacles, Lev 23:34.). The pretext for this arbitrary alteration of the law, which repeatedly describes the seventh month as the month appointed by the Lord (Lev 23:34, Lev 23:39, Lev 23:41), he may have found in the fact that in the...
Commenting on 1 Kings 12:32-33