The Apostle Zacchaeus was a rich publican at Jericho. Since he was short of stature, he climbed a sycamore tree in order to see the Savior passing by. After the Ascension of the Lord, St. Zacchaeus accompanied St. Peter on his travels. Tradition says he followed St. Peter to Caesarea, where Peter appointed him the Bishop of Caesarea in Palestine. He died in peace.
Sunday of Zacchaeus
In the Slavic lectionary, the Sunday of Zacchaeus is also the Sunday before the Triodion begins (though in the Byzantine lectionary, it may occur earlier). It is read at this point in the liturgical year, immediately before Great Lent, to teach that one should turn away from sins.
In this way the Lenten journey should begin with a recognition of sinfulness, just as Zacchaeus recognized his sins. He promised to make restitution by giving half of his wealth to the poor and by paying to those he had falsely accused four times as much as they had lost. In this, he went beyond the requirements of the Law (Ex. 22:3-12).
Just as Zacchaeus "sought to see who Jesus was" (Luke 19:3), that same desire and effort to see Jesus starts the movement through Lent towards Pascha. It is the first movement of salvation.