The reign of Jeroboam

• Jeroboam (King of Israel, son of Joash [Jehoash])

• Start — 2 Kings 15:1. The year Jeroboam's reign began is the year Azariah's reign began (3195) - 27 years + the Israel-Judah calendar year offset (since we're counting backwards) = 3169
• End — 2 Kings 14:23. The year Jeroboam's reign ended is the year his reign began (3169) + the length of his reign (41) - Israel's 1-year all-calendar-years overcount = 3209

Shulman, p124

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.