Xerxes' Assassination in 465BCXerxes, the father of Artaxerxes, was murdered by political aids in August, 465BC.
On December 20, 465BC, the Hebrew and Egyptian counting would have been in Artaxerxes' first year, while the Babylonians were still in the ascension year.
According to the 5th centuryBC Egyptian calendar and scholarly references, the Egyptian date of Mesore 1 occurred on November 11.