Josiah Ends 31-Year Reign (Judah)

Q: WHEN DID THE 7TH HEBREW MONTH OF JEHOIAKIM'S REIGN BEGIN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 545 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3502 AM.
3502AM/545BC Recap:
Josiah's 31-Year Reign Ended (began 3471AM/576BC—II 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).
Josiah is Killed—II Kings 23:28-30—Now the rest of the acts of Josiah, and all that he did, are they not written in the book of the chronicles of the kings of Judah? 29 In his days Pharaoh Necho king of Egypt went to the aid of the king of Assyria, to the River Euphrates; and King Josiah went against him. And Pharaoh Necho killed him at Megiddo when he confronted him. 30 Then his servants moved his body in a chariot from Megiddo, brought him to Jerusalem, and buried him in his own tomb. And the people of the land took Jehoahaz the son of Josiah, anointed him, and made him king in his father’s place.
Josiah's Son Jehoahaz Age 23 Reigned 3 Months—ended in the 7th month—II Kings 23:31—Jehoahaz was twenty-three years old when he became king, and he reigned three months in Jerusalem. His mother’s name was Hamutal the daughter of Jeremiah of Libnah.
Josiah's Son Jehoiakim Age 25 (previously Eliakim)—II Kings 23:34—Then Pharaoh Necho made Eliakim the son of Josiah king in place of his father Josiah, and changed his name to Jehoiakim. And Pharaoh took Jehoahaz and went to Egypt, and he died there.
Josiah's Son Jehoiakim Age 25 begins 11-Year Reign—II Kings 23:36—Jehoiakim was twenty-five years old when he became king, and he reigned eleven years in Jerusalem. His mother’s name was Zebudah the daughter of Pedaiah of Rumah.
Josiah's Son Jehoiakim Age 25 begins 11-Year Reign—II Chronicles 36:5—Jehoiakim was twenty-five years old when he became king, and he reigned eleven years in Jerusalem. And he did evil in the sight of the Lord his God.