Q: WHAT YEAR DID JEROBOAM BEGIN HIS REIGN IN ISRAEL?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 918 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3129 AM.
I Kings 14:20 – And the days which Jeroboam reigned were two and twenty years: and he slept with his fathers, and Nadab his son reigned in his stead.