On Pentecost we commemorate the day on which the Holy Spirit was poured out. We also speak of Pentecost as the day when the Holy Spirit was revealed and as the “birthday of the church of Christ”.

The sending of the Holy Spirit had been promised by the Son of God to His Apostles in His farewell discourses. As recorded in Acts 2: 1 et seq. the Apostles and the believers gathered with them were filled with the Holy Spirit.

Pentecost is a celebration of joy over the fact that the Holy Spirit is present and active in the church.