The reign of Manasseh

• Manasseh (King of Judah and son of Hezekiah)

• Start — no reference given. The year Manasseh's co-regency began is the year his sole reign began (3275) - the length of his co-regency (10) = 3265
• End — 2 Kings 21:1. The year Manasseh's reign ended is the year his reign (co-regency) began (3265) + the length of his reign (55) = 3320

Shulman, p126

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.