2 Chronicles 35:17-21

And the sons of Israel who were present celebrated the Passover at that time, and the Feast of Unleavened Bread for seven days.

There had not been a Passover celebrated like it in Israel since the days of Samuel the prophet; nor had any of the kings of Israel celebrated such a Passover as Josiah did with the priests, the Levites, all Judah and Israel who were present, and the inhabitants of Jerusalem.

In the eighteenth year of Josiah’s reign this Passover was celebrated. Josiah Dies in Battle

After all this, when Josiah had set the temple in order, Neco king of Egypt came up to wage war at Carchemish on the Euphrates, and Josiah went out to engage him.

But Neco sent messengers to him, saying, “What business do you have with me, King of Judah? I am not coming against you today, but against the house with which I am at war, and God has told me to hurry. For your own sake, stop interfering with God who is with me, so that He does not destroy you.”