Q: WHAT YEAR DID ASA'S REIGN END IN JUDAH?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 859 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3188 AM.
1 Kings 15:9-10 New King James Version (NKJV)
9 In the twentieth year of Jeroboam king of Israel, Asa became king over Judah. 10 And he reigned forty-one years in Jerusalem. His grandmother’s name was Maachah the granddaughter of Abishalom.