2 Chronicles 35:16-19

So everything was done that day for the worship of the LORD, as King Josiah commanded. The Passover was celebrated, and the burnt offerings were offered on the LORD’s altar. The Israelites who were there celebrated the Passover and the Feast of Unleavened Bread for seven days. The Passover had not been celebrated like this in Israel since the prophet Samuel was alive. None of the kings of Israel had ever celebrated a Passover like it was celebrated by King Josiah, the priests, the Levites, the people of Judah and Israel who were there, and the people of Jerusalem. This Passover was celebrated in the eighteenth year Josiah was king.