Who is commemorated during the festival of Pentecost in Christianity?

The festival of Pentecost in Christianity commemorates the event described in the New Testament where the Holy Spirit descends upon the apostles, empowering them to preach the Gospel and marking the beginning of the Christian Church. This event occurs fifty days after Easter and is significant because it fulfills the promise made by Jesus to send the Holy Spirit as a helper and guide to his followers. The apostles, who were initially in hiding, are transformed into bold witnesses and messengers of Jesus' teachings. This moment is often referred to as the "birthday of the Church," emphasizing the pivotal role of the apostles in the establishment of early Christian communities. Although other figures in Christianity are honored in various contexts, the direct commemoration of the apostles during Pentecost is central to the understanding and celebration of this feast.