Table 4. Synchronisms: Judah to Israel

Column 5 has the years that elapsed for the Israelite king, giving the synchronism to Israel provided by the court recorders of Judah. Although the court recorders would not have written things in this fashion, the dates they used correspond to those displayed here in Nisan/Tishri notation and their calculations correspond to those shown in column 5. By comparsion with column 4 and Table 1 (Israelite kings), it will be seen that the court recorders of Judah always used an official starting year (a Nisan year) from Israel, and they were always exact in their calculation of the synchronism.
 
Reference		 
King		 
began		 
in		 
Formula		More exact
date
1 K 15:1;2 Ch 13:1
1 K 15:9
1 K 22:41 		Abijah
Asa
Jehoshaphat 		sole reign
sole reign
sole reign 		18(17) Jeroboam
20(19) Jeroboam
4(3) Ahab 		931n-914n=17
931n-912n=19
874n-871n=3 		914n/914t
912t/911n
871t/870n
2 K 8:16
2 K 8:25
2 K 9:29 		Jehoram
Ahaziah
Ahaziah 		sole reign
sole reign
sole reign 		5(4) Joram
12(11) Joram
11 Joram 		852n-848n=4
852n-841n=11
852n-841n=11 		848n/848t
841n/841t
841n/841t
2 K 9;2 Ch 22
2 K 12:1
2 K 14:1 		Athaliah
Joash
Amaziah 		same time as
sole reign
sole reign 		Jehu
7(6) Jehu
2 Jehoash 		841n-835n=6
798n-796n=2
793n-767n=26 		841n/841t
835n/835t
796n/796t
2 K 15:1
2 K 15:32
2 K 16:1
2 K 18:1 		Uzziah
Jotham
Ahaz
Hezekiah 		sole reign
coregency
coregency
coregency 		27(26) Jeroboam
2 Pekah
17 Pekah
3 Hoshea 		793n-767n=26
752n-750n=2
752n-735n=17
732n-729n=3 		767n/767t
750n/750t
735n/735t
729t/728n
2 K 18:9
 
2 K 18:10
 
2 K 14:17;
2 Ch 25:25 		Hezekiah 4(3) = Hoshea 7
 
Hezekiah 6(5) = Hoshea 9;
 
Amaziah outlived Jehoash 15 years
  		729t-726t=3
732n-725n=7
729t-724t=5
732n-723n=9
782n-767n=15
  		725n/725t
 
723n/723t
 
767n/767t
 

Explanation of the "Nisan/Tishri" notation used in these tables
931nThe year beginning on the first of Nisan (a spring month) of 931 BC. Regnal years were reckoned from Nisan 1 in Assyria, Babylonia, and Israel.
931tThe year beginning on the first of Tishri of 931 BC. Tishri is a fall month, 6 months later than Nisan. Regnal years were reckoned from Tishri 1 in Judah. Sabbatical years started on Tishri 1. Jubilee years started on Tishri 10.
931n/931tThe six-month period beginning Nisan 1 of 931 BC.
931t/930nThe six-month period beginning Tishri 1 of 931 BC.