1 Kings 12:32

32Jeroboam held a feast on the fifteenth day of the 12:32 Jeroboam chose the eighth month to worship idols in competition with the Feast of Booths in Jerusalem during the seventh month at the temple.eighth month, like the feast which is kept in Judah, and he went up to the altar; he did this in Bethel, sacrificing to the calves which he had made. And he stationed in Bethel the priests of the high places which he had made. [Lev 23:34]