en_tn/2ch/35/18.md

Such a Passover celebration had never been held in Israel

This can be stated in active form. Alternate translation: "There had never been such a Passover celebration in Israel" (See: rc://en/ta/man/jit/figs-activepassive)

held in Israel

This refers specifically to the nation of Israel as a whole, as it was before the northern kingdom and southern king split.

from the days

"from the time"

the other kings of Israel

Here "Israel" refers specifically to the northern kingdom of Israel.