The document provides a summary of the Day of Pentecost, which commemorates the descent of the Holy Spirit upon the apostles. It includes the following key points:
1) Pentecost is the Greek name for the Feast of Weeks, a prominent feast in the ancient Israel calendar celebrating the giving of the Law on Sinai.
2) On the Day of Pentecost, the Holy Spirit descended upon the apostles as described in Acts 2, giving them the ability to speak in other tongues. This marks the "Birthday of the Church."
3) The passages from Genesis, Acts, John and Psalms relate to God giving his Spirit and laws to bring order, truth and peace