What is Pentecost?

On Pentecost Sunday, we remember the day the disciples received the Holy Spirit in a special way. The story in Acts 2 describes a powerful wind and tongues of fire as the Holy Spirit was poured out on people from all over the world who came to Jerusalem to celebrate a Jewish feast. At the first Pentecost over 3000 people were baptized, creating the first church. This is why Pentecost is known as the birthday of the Christian church.