Q: WHAT YEAR DID JOSIAH BECOME KING?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was approximately 576 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3471 AM.
2 Kings 22:1 Josiah was eight years old when he became king, and he reigned thirty-one years in Jerusalem. His mother's name was Jedidah the daughter of Adaiah of Bozkath.