This Sunday, April 1, is the Feast of the Entrance of Our Lord into Jerusalem (Palm Sunday). This feast day is one of the twelve Great Feasts of the Church and, along with Lazarus Saturday, marks the time between Great Lent and Holy Week.
“Palm Sunday is the celebration of the triumphant entrance of Christ into the royal city of Jerusalem. He rode on a colt for which He Himself had sent, and He permitted the people to hail Him publicly as a king. A large crowd met Him in a manner befitting royalty, waving palm branches and placing their garments in His path. They greeted Him with these words: “Hosanna! Blessed is he who comes in the name of the Lord, even the King of Israel! (John 12:13)”. [from Palm Sunday at oca.org]
The readings for this Sunday are: Genesis 49:1-2,8-12 (Vespers, 1st reading), Zephaniah 3:14-19 (Vespers, 2nd reading), Zechariah 9:9-15 (Vespers, 3rd reading), Matthew 21:1-11, 15-17 (Matins Gospel), Philippians 4:4-9 (Epistle), and John 12:1-18 (Gospel).