This article proposes the ancient Egyptian civil calendar as a dynamic and integrated system in which administrative, liturgical, and astronomical time reflect one another. Although Egyptological tradition has long defined it as a “wandering year” of 365 uncorrected days, the evidence emerging from a comparison between the Ebers Papyrus Calendar and the Cairo Calendar (Pap. Cairo 86637) suggests a more complex reality, one that remained coherent with the solar cycle. The Calendric Table, prepared for the paleographic and philological analysis of the glosses in the Ebers Papyrus, reveals a structural link between the two sources. It shows how the heliacal rising of Sirius (Sopdet) and the solar symbolism of Ra-Horakhty may have represented a continuum of harmonization between civil and ritual calendars. This connection highlights the possibility that Egyptian priests could realign the calendar on solemn occasions—such as royal coronations—thus preserving the cosmic balance of Maʿat. From this perspective, ancient Egypt appears not as a civilization bound to the inertia of a progressively drifting chronology, but as a system fully aware of its own celestial rhythm—able to translate the motions of the Sun and Sopdet into a theological measure of time. Finally, this reflection extends to the transmission of Egyptian astronomical knowledge to the Greek world—from Heliopolis to Plato and Eudoxus—reaffirming Egypt’s role as the cradle of a conception of time that was both scientific and sacred.
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Paolo Di Pasquale
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Paolo Di Pasquale (Mon,) studied this question.
www.synapsesocial.com/papers/69a75bdec6e9836116a23f7e — DOI: https://doi.org/10.5281/zenodo.18401453