2 Kings 23:23

23 In the year eighteen of King Josiah, this passover was made unto the LORD in Jerusalem.

2 Kings 23:23 Meaning and Commentary

2 Kings 23:23

But in the eighteenth year of king Josiah, wherein this
passover was holden to the Lord in Jerusalem.
] This shows that Josiah must begin the reformation very early that year, since he did all that is before recorded in this and the preceding chapter by the fourteenth of Nisan, the day on which the passover was kept, which month answers to part of our March and part of April, see ( 2 Kings 22:3 ) and was the same year the repairs of the temple were finished.

2 Kings 23:23 In-Context

21 Then the king commanded all the people, saying, Make the passover unto the LORD your God, as it is written in the book of this covenant.
22 Such a passover had not been made since the days of the judges that judged Israel, nor in all the days of the kings of Israel, nor of the kings of Judah.
23 In the year eighteen of King Josiah, this passover was made unto the LORD in Jerusalem.
24 In the same manner Josiah burned the spiritists, the diviners, the teraphim, the idols, and all the abominations that were spied in the land of Judah and in Jerusalem, that he might confirm the words of the law which were written in the book that Hilkiah the priest had found in the house of the LORD.
25 There was no king before him that converted like this to the LORD with all his heart and all his soul and all his might, according to all the law of Moses; neither did any like him arise after him.
The Jubilee Bible (from the Scriptures of the Reformation), edited by Russell M. Stendal, Copyright © 2000, 2001, 2010