No such Passover had been observed in Israel since the days of Samuel the prophet. None of the kings of Israel ever observed a Passover like the one that Josiah observed with the priests, the Levites, all Judah, the Israelites who were present, and the people of Jerusalem.

2 Kings 23:21
The king commanded all the people, "Keep the Passover of the LORD your God, as it is written in this Book of the Covenant."

2 Kings 23:22
No such Passover had been observed from the days of the judges who had governed Israel through all the days of the kings of Israel and Judah.

2 Chronicles 30:5
So they established a decree to circulate a proclamation throughout Israel, from Beersheba to Dan, that the people should come to keep the Passover of the LORD, the God of Israel, in Jerusalem. For they had not observed it as a nation as prescribed.

2 Chronicles 35:19
In the eighteenth year of Josiah's reign, this Passover was observed.

And there was no passover like to that kept in Israel from the days of Samuel the prophet; neither did all the kings of Israel keep such a passover as Josiah kept, and the priests, and the Levites, and all Judah and Israel that were present, and the inhabitants of Jerusalem.