The reign of Jehoash

• Joash (King of Judah, son of Ahaziah)

• Start — 2 Kings 12:1. The year Joash's reign began is the year Jehu's reign began (3121) + 7 years - the Israel-Judah calendar year offset = 3127
• End — 2 Kings 12:1. The year Joash's reign ended is the year his reign began (3127) + the length of his reign (40) - a 1-year duration overcount = 3166

START:*HYPOTHESIS: 3127 is the "seventh year of Jehu" when counted using Israel's non-accession-year approach. [Shulman date p83] [Ussher date p72] END:In this case, the duration (forty years) includes the first year of Joash's reign (3127). [Shulman date p83] [Ussher date p73]

Years are anno hominis — counted from Creation as year 1 — which is the frame the source computes in. The arithmetic behind each boundary is given above rather than assumed.