The Coronation of Christ

Acts 2:33 Therefore having been exalted to the right hand of God, and having received from the Father the promise of the Holy Spirit, He has poured forth this which you both see and hear.

Revelation reveals Christ’s reception of the Holy Spirit. It was then that he was coronated as high priest. Notice that the seven spirits have changed from lampstands to horns and eyes and moved from before the throne to the lamb

Rev. 4:5 Out from the throne come flashes of lightning and sounds and peals of thunder. And there were seven lamps of fire burning before the throne, which are the seven Spirits of God;
Re 5:6 And I saw between the throne (with the four living creatures) and the elders a Lamb standing, as if slain, having seven horns and seven eyes, which are the seven Spirits of God, sent out into all the earth.

This event was foretold by the Psalmist:
1 ¶ A Song of Ascents, of David. Behold, how good and how pleasant it is For brothers to dwell together in unity!
2 It is like the precious oil upon the head, Coming down upon the beard, Even Aaron’s beard, Coming down upon the edge of his robes.

It was at Pentecost, when the disciples were dwelling together in unity [of one accord], that the Holy Spirit was poured out. This happened when Jesus was crowned as high priest. He was anointed with the Holy Spirit and as promised, poured it upon the disciples.

Acts 1:4 Gathering them together, He commanded them not to leave Jerusalem, but to wait for what the Father had promised, "Which," He said, "you heard of from Me;
5 for John baptized with water, but you will be baptized with the Holy Spirit not many days from now."
6 ¶ So when they had come together, they were asking Him, saying, "Lord, is it at this time You are restoring the kingdom to Israel?"
7 He said to them, "It is not for you to know times or epochs which the Father has fixed by His own authority;
8 but you will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth."