In case there are any honest readers...
From Wikipedia:
Note that the position of the sun on the June solstice is 90°. Here are the details for the sun on 29 June 568 BCE, 29 June 588 BCE, and 9 July 588 BCE (using Cartes du Ciel, all observations from midday in Iraq). As can be seen, the position of the sun is only correct on 29 June for both years. Hence, as previously explained, the assertion that 9 Simanu 588 BCE was 9 July is impossible.Astronomical almanacs define the solstices as the moments when the Sun passes through the solstitial colure, i.e. the times when the apparent geocentric celestial longitude of the Sun is equal to 90° (June solstice) or 270° (December solstice).