Jeremiah 36:1

The Lord spoke to Jeremiah in the fourth year ¹  that Jehoiakim son of Josiah was ruling over Judah. ² 

2Ki 24:1,2; Jer 25:1; Jer 35:1

¹ sn The fourth year that Jehoiakim…was ruling over Judah would have been 605/4 b.c. Jehoiakim began his rule in 609/8 b.c. after his father Josiah was killed by Pharaoh Necho at Megiddo. Necho had installed him as puppet king in place of his brother Jehoahaz who was deposed by Necho after a reign of only three months (2 Kgs 23:31-35). According to Jer 46:2 that was the year in which Nebuchadnezzar defeated Jehoiakim’s suzerain Necho at Carchemish. That was also the same year that Jerusalem came under attack and submitted to Babylonian control after a brief siege (Dan 1:1; see the study note on 25:1 for the reason for the difference in the dating between Jer 25:1; 36:2 and Dan 1:1). These events confirmed what Jeremiah had been saying about the foe from the north (4:6; 6:1; 15:12) and would have provided the impetus for the hopes that the people would repent if they were reminded about what Jeremiah had been saying.

² tn Heb “This word came to Jeremiah from the Lord in the fourth year of Jehoiakim son of Josiah the king of Judah, saying.”