Augustine of Hippo

(de Con. Evang. iii. 24.) What Mark says, Very early in the morning, at the rising of the sun (Mark 16:1), does not contradict John’s words, when it was yet dark. At the dawn of day, there are yet remains of darkness, which disappear as the light breaks in. We must not understand Mark’s words, Very early in the morning, at the rising of the sun, ἡλίου ἀνατεέλαντος to mean that the sun was above the horizon, but rather what we ourselves ordinarily mean by the phrase, when we want any thing to be done very early, we say at the rising of the sun, i. e. some time before the sun is risen.