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.
St. E. Hijmans‘Sol Invictus, the Winter Solstice, and the Origins of Christmas,’Mouseion47 (2003) 377-98; St. E. Hijmans ‘Sol: The Sun in the Art and Religions of Rome’ (PhD dissertation University of Groningen 2009) http://dissertations.ub.rug.nl/faculties/arts/2009/s.e.hijmans/ 583-95.
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.