The Day of Pentecost marks the descent of the Holy Spirit upon the Apostles, as told in Acts 2:1-13. Here is an excerpt from the story:

"When the Day of Pentecost had fully come, they were all with one accord in one place. And suddenly there came a sound from heaven, as of a rushing mighty wind, and it filled the whole house where they were sitting. Then there appeared to them divided tongues, as of fire, and one sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance." - Acts 2:1-4

Pentecost Sunday is 50 days after Easter (May 15, 2016). On this day, churches often celebrate the gift of the Holy Spirit and God's presence in our lives.

Here are a few spirit-filled anthems (sorry, I couldn't resist!) for your Pentecost celebration: