Q: WHAT YEAR DID JEHOHASH/JOASH 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 774 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3263 AM.
2 Kings 13:10 – In the thirty and seventh year of Joash king of Judah began Jehoash the son of Jehoahaz to reign over Israel in Samaria, and reigned sixteen years.