Clement, Stromateis 1.21.145. In addition, Christians in Clement’s native Egypt seem to have known a commemoration of Jesus’ baptism—sometimes understood as the moment of his divine choice, and hence as an alternate “incarnation” story—on the same date (Stromateis 1.21.146). See further on this point Thomas J. Talley, Origins of the Liturgical Year, 2nd ed. (Collegeville, MN: Liturgical Press, 1991), pp. 118–120, drawing on Roland H. Bainton, “Basilidian Chronology and New Testament Interpretation,” Journal of Biblical Literature 42 (1923), pp. 81–134; and now especially Gabriele Winkler, “The Appearance of the Light at the Baptism of Jesus and the Origins of the Feast of the Epiphany,” in Maxwell Johnson, ed., Between Memory and Hope: Readings on the Liturgical Year (Collegeville, MN: Liturgical Press, 2000), pp. 291–347.