Published online by Cambridge University Press: 11 September 2025
Andreas composed an Easter table and 200-year list of Easter dates that started in 352. It was based on the work of Anatolius of Laodicea and Hippolytus. To this a chronography was added, which is attested in Syriac but mostly in Armenian. Indeed, at the end of the sixth century, the work of Andreas travelled to Armenia, where it became the basis for the Armenian calendar. Andreas is the first known author to combine computus and chronography. He is also the earliest author to defend 6 January as the date for Christmas, and he is unique in proposing AM 5600 as the start of the Christian era.
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