On the evening of Resurrection Sunday, Jesus conferred the
Holy Spirit upon the Apostles.
John 20:22
He breathed on them and said to them, "Receive the
holy Spirit."
Fifty days later, on the Jewish feast of Pentecost, the
Apostles received the presence of the Holy Spirit and a greater
empowering as promised by Christ (John 15:26 and 16:7).
Acts 2:4
And they were all filled with the holy Spirit ...