During which festival do Christians celebrate the coming of the Holy Spirit?

The correct response highlights Pentecost as the festival during which Christians celebrate the coming of the Holy Spirit. This event is traditionally observed on the 50th day after Easter Sunday, marking the end of the Easter season. Pentecost is significant in Christian theology as it commemorates the moment when the Holy Spirit descended upon the apostles, enabling them to preach the Gospel with power and boldness. This incident is described in the Book of Acts in the New Testament, where the apostles began speaking in different languages, symbolizing the universality of the Christian message.

Each of the other festivals mentioned serves a different purpose in the Christian liturgical calendar. Advent is a season of preparation for Christmas and does not focus on the Holy Spirit's coming. Easter celebrates the resurrection of Jesus Christ. Epiphany marks the revelation of Christ to the Gentiles, represented by the visit of the Magi, and does not pertain to the event of Pentecost. Thus, Pentecost stands out as the festival directly related to the Holy Spirit's arrival, making it the appropriate choice.