The importance of a fixed era by which to date events was not discovered by the Hebrews until after their national existence came to an end. All the endeavours to fix such an era which we find in our OT
In the four hundred and eightieth year after the people of Israel came out of the land of Egypt, in the fourth year of Solomon's reign over Israel, in the month of Ziv, which is the second month, he began to build the house of the LORD.
Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel.
Ahaziah the son of Ahab began to reign over Israel in Samaria in the seventeenth year of Jehoshaphat king of Judah, and he reigned two years over Israel.
The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.