He in the first year of his reign, in the {a} first month, opened the {b} doors of the house of the LORD, and repaired them.

(a) This is a notable example for all princes, first to establish the pure religion of God and to procure that the Lord may be honoured and served correctly.

(b) Which Ahaz had shut up, 2Ch 28:24.

Scofield Reference Notes

Margin first month

i.e. April.2 Chronicles 29:3 Parallel Commentaries

Twenty-Fourth Day. Holiness and Cleansing.
Having therefore these promises, beloved, let us cleanse ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God.'--2 Cor. vii. 1. That holiness is more than cleansing, and must be preceded by it, is taught us in more than one passage of the New Testament. 'Christ loved the Church, and gave Himself up for it, that He might sanctify it, having cleansed it by the washing of water with the word.' 'If a man cleanse himself from these, he shall be a vessel …
Andrew Murray—Holy in Christ

Chronicles
The comparative indifference with which Chronicles is regarded in modern times by all but professional scholars seems to have been shared by the ancient Jewish church. Though written by the same hand as wrote Ezra-Nehemiah, and forming, together with these books, a continuous history of Judah, it is placed after them in the Hebrew Bible, of which it forms the concluding book; and this no doubt points to the fact that it attained canonical distinction later than they. Nor is this unnatural. The book …
John Edgar McFadyen—Introduction to the Old Testament