Charles Ellicott Commentary 2 Chronicles 35:1

"And Josiah kept a passover unto Jehovah in Jerusalem: and they killed the passover on the fourteenth [day] of the first month." — 2 Chronicles 35:1 (ASV)

Moreover. — And. The form of the Hebrew verb implies that this Passover was held after the renewal of the covenant; and 2 Kings 23:23 fixes the date precisely as the eighteenth year of king Josiah.

Kept. — Made (2 Chronicles 30:1).

On the fourteenth day of the first month. — In strict accordance with the law. Hezekiah’s Passover was irregular in point of time (2 Chronicles 30:2; 2 Chronicles 30:13).