Calculating December 25 as the Birth of Jesus in Hippolytus’ Canon and Chronicon

in Vigiliae Christianae
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This article argues that around 235 ce Hippolytus of Rome placed the birth of Jesus on December 25. While this has been theorized in the past, this article brings forward hitherto unheralded evidence about Jesus’ birth from Hippolytus’ Canon and his Chronicon. First, the Canon marks the Passover as the γένεσις of Jesus, a word which scholars have previously thought refers to birth. This article however uses evidence from an extensive word study to show that the term most likely refers to conception, which would then place the birth of Jesus sometime in late fall or early winter. Secondly, the article shows that in his Chronicon Hippolytus placed Jesus’ birth exactly nine months after the anniversary of the world’s creation. Calculations in his Chronicon and Canon indicate that Hippolytus thought the world was created on March 25, meaning that he likely believed that Jesus was born on December 25.

Calculating December 25 as the Birth of Jesus in Hippolytus’ Canon and Chronicon

in Vigiliae Christianae




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FörsterDie Anfänge von Weihnachten und Epiphanias306-08.


Nothaft‘Early Christian Chronology’ 264.


BrentHippolytus and the Roman Church in the Third Century5-50. Brent persuasively argues that the statue was indeed found in the Via Tiburtina contra Margherita Guarducci ‘La Statua di sant’Ippolito’e la sua provenienza’ Nuove ricerche su Ippolito. Studia Ephemeridis Augustinianum 30 (1989) 61-74.


PlinyNatural History 18.66; Columella De re rustica 9.14; John Lydus De mensibus 61.


G. Liddell R. Scott St. Jones eds.‘γένεσις,’ The Liddell-Scott-Jones Greek-English Lexicon343.


BrentHippolytus and the Roman Church in the Third Century297-99; Marcovich Hippolytus Refutatio Omnium Haeresium 8-17.


Liddell Scott Jones‘ἢ,’ The Liddell-Scott-Jones Greek-English Lexicon761.


NothaftDating the Passion: The Life of Jesus and the Emergence of Scientific Chronology (200-1600)42-43.


Helm and BauerHippolytus Werke: Die Chronik115.


Bainton‘Basilidian Chronology’ 96.


Bainton‘Basilidian Chronology’ 109-110.


Bainton‘Basilidian Chronology’ 84.

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