In the eighth month of the second year of Darius, the word of the LORD came to the prophet Zechariah son of Berekiah, the son of Iddo...   Zechariah 1:1 (NIV)

In the ancient world, time was counted according to the reign of great kings. So the calendar changed with the kingdoms.

Once the King of Kings was born into our world, all the dates, forward and backward, were renumbered by that event... and are never changed.

The incarnation of Jesus Christ marks the central event of all human history!

Amen. Come, Lord Jesus.