Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 13:31-35

“As if He says, What think ye of My death? Behold, a little while, and it will come to pass. But by the words, To day and to morrow, are signified many days; as we also are wont to say in common conversation, “To day and to morrow such a thing takes place,” not that it happens in that interval of time. And to explain more clearly the words of the Gospel, you must not understand them to be, I must walk to day and to morrow, but place a stop after to day and to morrow, then add, and walk on the day following, as frequently in reckoning we are accustomed to say, “The Lord’s day and the day after, and on the third I will go out,” as if by reckoning two, to denote the third. So also our Lord speaks as if calculating, I must do so to day, and so to morrow, and then afterward on the third day I must go to Jerusalem.”