The Season of Pentecost

We celebrate the day the Holy Spirit empowered the apostles to preach the word and be used by God to win souls for Christ.
Meanings
Pentecost is often called the birthday of the church because it is the day that the Holy Spirit was given to the disciples in the upper room and they were empowered to go out to preach the Good News of Salvation.
The word Pentecost means "fiftieth day". It was adopted by Christians from the Jews. For them, Pentecost was the Feast of the Weeks, a celebration of the conclusion of the grain harvest. Bread made from the freshly-reaped grain was presented as an offering to God. The Jewish people eventually came to associate the delivery of the Law to Moses on Mt. Sinai with the Feast of the Weeks.
When Christ Church celebrates the season of Pentecost, we display the banner at right on the front of our altar.
So they said to him, ‘What sign are you going to give us then, so that we may see it and believe you? What work are you performing? Our ancestors ate the manna in the wilderness; as it is written, “He gave them bread from heaven to eat.” ’ Then Jesus said to them, ‘Very truly, I tell you, it was not Moses who gave you the bread from heaven, but it is my Father who gives you the true bread from heaven. For the bread of God is that which comes down from heaven and gives life to the world.’ They said to him, ‘Sir, give us this bread always.’
Jesus said to them, ‘I am the bread of life. Whoever comes to me will never be hungry, and whoever believes in me will never be thirsty.
John 6:30-35
Early Christians found in Pentecost not only a thanksgiving for the fruits of the Spirit to supplant the Jewish thanksgiving for the fruits of the earth, but also the date of the founding of the Christian church to supplant the old dispensation symbolized by the delivery of the Law to Moses.
The title, Whitsunday, which means White Sunday, comes from the white garments worn by those baptized at Pentecost, just as the Sunday after Easter was once called White Sunday for the same reason. In the ancient church, the constant color for the church year seasons appears to have been white, or possibly an unbleached white. The first clear reference to another color is to red for Pentecost, in the twelfth century.
Pentecost was the conclusion of the church's first and earliest season, which began with Easter. St. Paul kept Pentecost with the Christians of Ephesus (Acts 20:6), and in the year 58 he spent Easter with the Philippian Christians, "not departing till the feast was over; and he then hastened on his journey and even sailed by Ephesus, in order to keep Pentecost in Jerusalem" (Acts 18:21, 20:6, 16).
What Happened On Pentecost?
When the day of Pentecost had come, they were all together in one place. And suddenly from heaven there came a sound like the rush of a violent wind, and it filled the entire house where they were sitting. Divided tongues, as of fire, appeared among them, and a tongue rested on each of them. All of them were filled with the Holy Spirit and began to speak in other languages, as the Spirit gave them ability.
Now there were devout Jews from every nation under heaven living in Jerusalem. And at this sound the crowd gathered and was bewildered, because each one heard them speaking in the native language of each. Amazed and astonished, they asked, ‘Are not all these who are speaking Galileans? And how is it that we hear, each of us, in our own native language?
Acts 2:1-8
Pentecost was the 50th day after the Sabbath of Passover week (Leviticus 23:15-16). They (the disciples) were all together in one place.
The Bible tells us here that "every nation under heaven" was represented that day and heard Peter's address to the crowd in which he interpreted the prophets' sayings, explained that Jesus died and rose again, and gave them the Good News of the Gospel that if they would repent and be baptized, "every one of you, in the name of Jesus Christ for the forgiveness of your sins" they would receive the gift of the Holy Spirit.
For the promise is for you, for your children, and for all who are far away, everyone whom the Lord our God calls to him.
Acts 2:39
These representatives from "every nation under heaven" no doubt went back to their native lands and told of the phenomenal event they had experienced. The seed of the Gospel was therefore cast to the entire world that day. There would be no nation that did not hear of the Good News of salvation. We are called to be God's witnesses in the same way. It is our responsibility to share the Good News with our loved ones and neighbors. The seed has been sown. Let us not trample it out, but nurture it!
Much of the above information is taken from The Christian Year by Edward T. Horn, III.