Reconstructing Metonic 19‑year Lunar Cycles
(on the basis of NASA’s Six Millennium Catalog of Phases of the Moon)
This book (ISBN 9789090324678), available via this website (see next paragraph), explains, by following the mainstream of the history of the computus paschalis developed from early in the third century on behalf of the determination of the (Alexandrian or Julian calendar) date of Paschal Sunday, which rised shortly after AD 250 in Alexandria (Egypt) to finally (in the year 1582) flow into the modern way of determining the (Gregorian calendar) date of the Sunday of Easter, how of old the date of Paschal Sunday depends on the phases of the moon, and provides in particular, on the basis of NASA’s Six Millennium Catalog of Phases of the Moon, the reconstruction of both lost Alexandrian Metonic 19‑year lunar cycles which in all probability were constructed under the authority or at least within the sphere of influence of the episcopacy of the church of Alexandria before the first council of Nicaea (AD 325), turning point in the history of Christianity.
This pioneering book on early Alexandrian computus (= Paschal reckoning) is available at www.boekenbestellen.nl (delivery time for Europe is 3 to 7 days).
© Jan Zuidhoek 2019-2021