If you use an encyclopedia you will find the dates provided for the rule of Israelite kings varies from Watchtower chronology. Your study conductor seems to have made an untested assumption.
Eg Wikipedia - reign of Zedekiah to 597 BCE-587 BCE, while E. R. Thiele to 597 BCE-586 BCE
Both William F. Albright and E. R. Thiele agree on dating his reign to 609 BC-598 BC
The Hebrew Bible places David's reign from around 1005 BCE until around 965 BCE
Now compare this to
***
it-1pp.464-466Chronology***THETWELVE-TRIBEKINGDOM
Dates B.C.E.
SAUL began to rule as king 1117
over all 12 tribes
(40 years)
Prophet: Samuel
High priests: Ahijah,
Ahimelech
Birth of David 1107
Samuel completed book of c. 1100
Judges
Samuel completed book c. 1090
of Ruth
Book of 1 Samuel was c. 1078
completed
DAVID began to rule as 1077
king of Judah at Hebron (40)
Prophets: Nathan, Gad,
Zadok
High priest: Abiathar
David became king over 1070
all Israel; made
Jerusalem his capital
Gad and Nathan completed c. 1040
2 Samuel
SOLOMON began to rule as 1037
king (40)
Prophets: Nathan, Ahijah,
Iddo
High priests: Abiathar,
Zadok
Construction of Solomon’s 1034
temple began
Temple built by Solomon in 1027
Jerusalem was completed
Solomon wrote Song of c. 1020
Solomon
Solomon wrote book of b. 1000
Ecclesiastes
KINGDOM
OFJUDAHKINGDOMOFISRAELREHOBOAM began to rule as 997 JEROBOAM began to rule as
king (17 years); nation king over the northern 10
split into two kingdoms tribes, apparently first
from Shechem, then from
Tirzah (22 years)
Prophets: Shemaiah, Iddo Prophet: Ahijah
Shishak of Egypt invaded 993
Judah and took
treasures from temple
in Jerusalem
ABIJAH (ABIJAM) began to 980
rule as king (3)
Prophet: Iddo
ASA evidently began to rule 978
(41), but his first regnal
year counted from 977
Prophets: Azariah, Oded,
Hanani
c. 976 NADAB began to rule as
king (2)
c. 975 BAASHA assassinated Nadab
and then began to rule as
king (24)
Prophet: Jehu (son of
Hanani)
Zerah the Ethiopian came 967
against Judah in war
c. 952 ELAH began to rule as
king (2)
c. 951 ZIMRI, a military chief,
assassinated Elah and then
ruled as king (7 days)
c. 951 OMRI, chief of the army,
began to rule as king (12)
c. 951 Tibni became king over
part of the people,
further dividing the
nation
c. 947 Omri overcame Tibni’s
opposition and became
sole ruler in Israel
c. 945 Omri bought the mountain
of Samaria and built
his capital there
c. 940 AHAB began to rule as
king (22)
Prophets: Elijah,
Micaiah
JEHOSHAPHAT evidently began 937
to rule (25), but his first
regnal year counted
from 936
Prophets: Jehu (son of
Hanani), Eliezer, Jahaziel
High priest: Amariah
c. 920 AHAZIAH, son of Ahab,
‘became king’ (2);
evidently his father was
still living;
Ahaziah’s years of
rulership may count
from c. 919
Prophet: Elijah
Jehoram the son of c. 919
Jehoshaphat became
associated in some way
with his father in the
government
c. 917 JEHORAM, son of Ahab,
began to rule as sole king
of Israel (12); but in at
least one text the brief
reign of his brother
Ahaziah, who died sonless,
also may have been
credited to Jehoram
Prophet: Elisha
JEHORAM became official 913
coregent with Jehoshaphat,
from which time Jehoram’s
kingship may be counted (8)
Prophet: Elijah
Jehoshaphat died and c. 911
Jehoram became sole
ruler
AHAZIAH, son of Jehoram, c. 906
began to rule (1), though
perhaps anointed to kingship
in c. 907
High priest: Jehoiada
ATHALIAH usurped the c. 905 JEHU, a military chief,
throne (6) assassinated Jehoram and
then began to rule (28);
but it seems that his
years of kingship counted
from c. 904
Prophet: Elisha
JEHOASH, son of Ahaziah,
began to rule as king (40) 898
High priest: Jehoiada
876 JEHOAHAZ began to rule as
king (17)
c. 862 Jehoash evidently became
associated in the
kingship with his
father, Jehoahaz
c. 859 JEHOASH, son of Jehoahaz,
began to rule as sole king
of Israel (16)
Prophet: Elisha
AMAZIAH began to rule as 858
king (29)
Jehoash of Israel a. 858
captured Amaziah,
breached the wall of
Jerusalem, and took
treasures from temple
c. 844 JEROBOAM II began to rule
as king (41)
Prophets: Jonah, Hosea,
Amos
Book of Jonah was written
UZZIAH (AZARIAH) began to 829
rule as king (52)
Prophets: Hosea, Joel (?),
Isaiah
High priest: Azariah (II)
Book of Joel was perhaps c. 820
written
Uzziah ‘became king’ in c. 818
some special sense,
possibly now free from
domination of Jeroboam II
Book of Amos was written c. 804
c. 803 ZECHARIAH ‘began to reign’
in some sense, but
evidently the kingship was
not fully confirmed as his
until c. 792 (6 months)
c. 791 SHALLUM assassinated
Zechariah and then ruled
as king (1 month)
c. 791 MENAHEM assassinated
Shallum and then began to
rule, but it seems that
his years of kingship
counted from c. 790 (10)
c. 780 PEKAHIAH began to rule as
king (2)
c. 778 PEKAH assassinated
Pekahiah and then began to
rule as king (20)
Prophet: Oded
JOTHAM began to rule as 777
king (16)
Prophets: Micah, Hosea,
Isaiah
AHAZ evidently began to rule 762
(16), but his first regnal
year counted from 761
Prophets: Micah, Hosea,
Isaiah
High priest: Urijah (?)
Ahaz evidently became c. 759
tributary to
Tiglath-pileser III
of Assyria
c. 758 HOSHEA assassinated Pekah
and then ‘began to reign’
in place of him, but it
seems that his control
became fully established
or possibly he received
the backing of the
Assyrian monarch
Tiglath-pileser III in
c. 748 (9 years)
HEZEKIAH evidently began 746
to rule (29), but his first
regnal year counted from 745
Prophets: Micah, Hosea,
Isaiah
High priest: Azariah (II or
III)
a. 745 Book of Hosea was
completed
742 Assyrian army began siege
of Samaria
740 Assyria conquered Samaria,
subjugated Israel;
northern kingdom came to
its end
Sennacherib invaded Judah 732
Book of Isaiah was a. 732
completed
Book of Micah was completed b. 717
Compiling of Proverbs was c. 717
completed
MANASSEH began to rule as 716
king (55)
AMON began to rule as king (2) 661
JOSIAH began to rule as 659
king (31)
Prophets: Zephaniah,
Jeremiah, the prophetess
Huldah
High priest: Hilkiah
Book of Zephaniah was b. 648
written
Book of Nahum was written b. 632
JEHOAHAZ ruled as king 628
(3 months)
JEHOIAKIM began to rule as 628
king, tributary to Egypt (11)
Prophets: Habakkuk (?),
Jeremiah
Book of Habakkuk was c. 628
perhaps written
Nebuchadnezzar II makes 620
Jehoiakim tributary to
Babylon
JEHOIACHIN began to rule as 618
king (3 months 10 days)
Nebuchadnezzar II took 617
Jewish captives and
temple treasures to
Babylon
ZEDEKIAH began to rule as 617
king (11)
Prophets: Jeremiah, Ezekiel
High priest: Seraiah
Nebuchadnezzar II invaded 609
Judah again; siege of
Jerusalem began