2 Chronicles 24:1

Joas reigns well all the days of Joiada: afterwards falls into idolatry and causes Zacharias to be slain. He is slain himself by his servants.

1Joash was seven years old when he had begun to reign. And he reigned for forty years in Jerusalem. The name of his mother was Zibiah, from Beersheba.
24:1The years of the reigns of kings were counted from Nisan 1 (the start of the year in the Jewish sacred calendar). The years of life of any Jew were counted by the number of Passovers (starting Nisan 14) in that person’s life since birth (see my book Important Dates in the Lives of Jesus and Mary).(Conte)
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