This Sunday we celebrate the Feast of the Ascension of Our Lord. There are three great feasts during the fifty-day long Easter Season in the Church: Easter Sunday, Ascension Sunday, and Pentecost Sunday when the Holy Spirit entered the apostles. The three feasts are interconnected and have to be understood in relation to one another. 

This Sunday is the Feast of Pentecost. Pentecost, the beginning and birthday of the Church, is an annual feast that closes out the Easterseason 50 days after the resurrection is celebrated. The word Pentecost has its root in the Greek word that means five. It is also a word that was used in Judaism during the time of Jesus, as Pentecost was the word used for the harvest festival Shavuot.