Acts 2: The Day of the Pentecost

What was the day of the Pentecost?

The Pentecost was a special day when a marvelous outpouring of the Holy Ghost converted over 3000 people into the Church. "Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls." (Acts 2:41)
Pentecost means "fiftieth" in Greek, so this was a special feast to show gratitude to God fifty days after Passover where large numbers of faithful Jews gathered together. 

Teachings from Peter on this day:

• A miracle occurred during this feast. People began speaking in tongues! They were able to speak different languages and understand each other. How is this possible? Many of the men claimed the Apostles to be drunk. Peter responded by standing up and denying the drunk accusation of the men. (It was only the third hour of the day. Why would someone be drunk at such an early hour anyway?) He repeated the words of the Prophet Joel, "And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams." (Acts 2:17)
• In Acts 2:36, Peter lays the blame for Jesus' crucifixion directly on the Jews. God made the same Jesus the Lord and Christ, "whom ye have crucified." The people were truly touched by these words and asked what they should do. It was then that Peter told them to "Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the Holy Ghost." (Acts 2:38)

Peter was able to fulfill his role as a special witness of Christ by moving the hearts of these people, and he partnered with the Holy ghost to convert 3000 souls in one day. 

What gifts of the Spirit were made manifest on the day of the Pentecost?
Many spiritual gifts were present on this special day. At the beginning of the feast, the gift of communication was blessed upon the people. "And there appeared unto them cloven tongues like as of fire, and it sat upon each of them." Later, Peter prophesied unto the people to repent and be baptized, and 3000 people were able to receive the Holy Ghost, one of the greatest gifts one can ever have.

The hearts of these people made a black-and-white change on this day. They left the natural ways of man and gave up their hearts to Jesus Christ, and they were able to have the Holy Ghost with them. "And fear came upon every soul: and many wonders and signs were done by the apostles." (Acts 2:43)