Jerusalem came under final siege in Zedekiah’s 9th year (609 B.C.E.), and the city fell in his 11th year (607 B.C.E.), corresponding to Nebuchadnezzar’s 19th year of actual rule (counting from his accession year in 625 B.C.E.). (2Ki 25:1-8) In the fifth month of that year (the month of Ab, corresponding to parts of July and August) the city was set afire, the walls were pulled down, and the majority of the people were led off into exile. However, “some of the lowly people of the land” were allowed to remain, and these did so until the assassination of Gedaliah, Nebuchadnezzar’s appointee, whereupon they fled into Egypt, finally leaving Judah completely desolate. (2Ki 25:9-12, 22-26) This was in the seventh month, Ethanim (or Tishri, corresponding to parts of September and October).

From 997 B.C.E. to desolation of Jerusalem. A helpful guide to the overall length of this period of the kings is found at Ezekiel 4:1-7 in the mimic siege of Jerusalem that the prophet Ezekiel carried out at God’s direction. Ezekiel was to lie on his left side for 390 days to “carry the error of the house of Israel,” and on his right side for 40 days to “carry the error of the house of Judah,” and each day was shown to stand for a year. The two periods (of 390 years and of 40 years) thus symbolized evidently stood for the length of Jehovah’s forbearance with the two kingdoms in their idolatrous course. The Jewish understanding of this prophecy, as presented in the Soncino Books of the Bible (commentary on Ezekiel, pp. 20, 21) is: “The guilt of the Northern Kingdom extended over a period of 390 years ([according to the] Seder Olam [the earliest postexilic chronicle preserved in the Hebrew language], [and Rabbis] Rashi and Ibn Ezra). Abarbanel, quoted by Malbim, reckons the period of Samaria’s guilt from the time when the schism took place under Rehoboam . . . until the fall of Jerusalem. . . . The right [side, on which Ezekiel lay] indicates the south, i.e. the Kingdom of Judah which lay to the south or right. . . . Judah’s corruption lasted forty years beginning soon after Samaria’s fall. According to Malbim, the time is reckoned from the thirteenth year of the reign of Josiah . . . when Jeremiah began his ministry. (Jer. i. 2).”​—Edited by A. Cohen, London, 1950.

From the division of the kingdom in 997 B.C.E. to the fall of Jerusalem in 607 B.C.E. was 390 years. While it is true that Samaria, the capital of the northern kingdom, had already fallen to Assyria in 740 B.C.E., in Hezekiah’s sixth year (2Ki 18:9, 10), it is probable that some of the population fled into the southern kingdom before the Assyrians’ advance. (Note also the situation in Judah following the division of the kingdom as described at 2Ch 10:16, 17.) But, more important, the fact that Jehovah God continued to keep the Israelites of the exiled northern kingdom in view, the messages of his prophets continuing to include them long beyond the fall of Samaria, shows that their interests were still represented in the capital city of Jerusalem and that its fall in 607 B.C.E. was an expression of Jehovah’s judgment against not Judah alone but the nation of Israel as a whole. (Jer 3:11-22; 11:10-12, 17; Eze 9:9, 10) When the city fell, the hopes of the nation as a whole (with the exception of the few who maintained true faith) suffered collapse.​—Eze 37:11-14, 21, 22.

In the chart that follows, this 390-year period is adhered to as a sound chronological guide. A summation of the years listed for all the reigns of the kings of Judah from Rehoboam to Zedekiah gives a total of 393 years. Whereas some Biblical chronologers endeavor to synchronize the data concerning the kings by means of numerous coregencies and “interregnums” on the Judean side, it appears necessary to show only one coregency. This is in the case of Jehoram, who is stated (at least in the Masoretic text and some of the oldest manuscripts of the Bible) to have become king “while Jehoshaphat was king of Judah,” thus giving some basis for assuming a coregency. (2Ki 8:16) In this manner the overall period comes within the 390-year limit.

The chart is not intended to be viewed as an absolute chronology but, rather, as a suggested presentation of the reigns of the two kingdoms. The ancient inspired writers were dealing with facts and figures well known to them and to the Jewish people then, and the different chronological viewpoints adopted by the writers at certain points presented no problem. Such is not the case today, and hence we may be satisfied with simply setting out an arrangement that harmonizes reasonably with the Biblical record.