Augustine of Hippo
Catena Aurea · Matthäusevangelium 3
In those days came John the Baptist, preaching in the wilderness of Judæa, And saying, Repent ye: for the kingdom of heaven is at hand. For this is he that was spoken of by the Prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make His paths straight.
(De Con. Evan. ii. 6.) Luke describes the time by the reigning sovereigns. (Luke 3:1.) But Matthew must be understood to speak of a wider space of time by the phrase ‘those days,’ than the fifteenth year of Tiberius. Having related Christ’s return from Egypt, which must be placed in early boyhood or even infancy, to make it agree with what Luke has told of His being in the temple at twelve years old, he adds directly, In those days, not intending thereby only the days of His childhood, but all the days from His birth to the preaching of John.