'Fifteenth' in the Bible

On the fifteenth day he sent the people away. So they blessed the king and went home to their tents rejoicing and with joyful hearts for all the goodness that the Lord had done for His servant David and for His people Israel.

Jeroboam made a festival in the eighth month on the fifteenth day of the month, like the festival in Judah. He offered sacrifices on the altar; he made this offering in Bethel to sacrifice to the calves he had set up. He also stationed the priests in Bethel for the high places he had set up.

He offered sacrifices on the altar he had set up in Bethel on the fifteenth day of the eighth month. He chose this month on his own. He made a festival for the Israelites, offered sacrifices on the altar, and burned incense.