The Byzantine Calendar is set on the basis that Jesus Christ was thought to have been born in the year 5509 Annus Mundi (AM) - the year since the creation of the world according to the Spetuagint [[Septuagint]] dating.<ref>Paul Stephenson. "Translations from Byzantine Sources: The Imperial Centuries, c.700-1204: John Skylitzes, "Synopsis Historion": The Year 6508, in the 13th Indiction: the Byzantine dating system". November 2006.</ref>