Archaeoastronomer Wrote:
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> It must be understood that Cleopatra thought she was Isis on Earth

Then it would certainly make sense for her to continue with the Egpytian Isis / Hathor new year celebrations at the day of the yearly Sirius heliacal rising. Why should she chose to start the year at Jan 1st instead? Or did I misunderstand you that you only pointed to the year 45BC and not the start of the Egyptian year?

Interestingly there are only about 3 temples aligned really precisely to the Sirius heliacal rising. Many are roughly aligned, but most likely just copied the orientation without the builders knowing the real background.