"December 28, 47 BCE: During the reign of Cleopatra fell the inauguration of the Osiris Chapel in the Hathor Temple of Dendera on a zenithal full moon." In the thread, Rosalind Park @starryEgypt is Replying to @SarahEBond @MuseeLouvre telling that it was not a Full Moon, but New Moon in Pisces therefore another month." Link to Park's publication on Dendera Zodiac.
What is here interesting is the fact that, at Dendera, the Moon as a zenith passage in the sky.
See please the result by mooncalc.org
For the Zenith Passage of the sun and its role in architecture, see please