Q: WHEN DID JEHOIACHIN'S CAPTIVITY BEGIN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 533 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3514 AM.
1—Jehoiachin's 3-Month Reign Ends II Kings 24:12—Then Jehoiachin king of Judah, his mother, his servants, his princes, and his officers went out to the king of Babylon; and the king of Babylon, in the eighth year of his reign, took him prisoner.
2—Johoiachin's 37 Years of Captivity Begin [Ends 3551AM/496BC]
3—Nebuchadnezzar's 9th Year
4—70-Year Prophesy of the Fall of Babylon Begins Jeremiah 29:10—For thus says the Lord: After seventy years are completed at Babylon, I will visit you and perform My good word toward you, and cause you to return to this place.
5—Mattaniah renamed Zedekiah by Nebuchadnezzar II Kings 24:17—Then the king of Babylon made Mattaniah, Jehoiachin’s uncle, king in his place, and changed his name to Zedekiah.
6—Zedekiah Age 21 Became King II Chronicles 36:10-11—10 At the turn of the year King Nebuchadnezzar summoned him and took him to Babylon, with the costly articles from the house of the Lord, and made Zedekiah,[a] [b]Jehoiakim’s brother, king over Judah and Jerusalem. 11 Zedekiah was twenty-one years old when he became king, and he reigned eleven years in Jerusalem. II Kings 24:18—Zedekiah was twenty-one years old when he became king, and he reigned eleven years in Jerusalem. His mother’s name was Hamutal the daughter of Jeremiah of Libnah.