Fifty days after the Savior had been resurrected, the disciples gathered in Jerusalem for the Feast of Weeks or Shavuot. This important feast commemorated when Moses received the Law on Mount Sinai. As the disciples celebrated with tens of thousands of other Jews from around the world, the Holy Spirit came down upon the disciples as flames of fire. Today this is known as the day of Pentecost. As we better understand the historical background of the feasts, we can gain greater insight into the importance of Pentecost and our own worship of the Lord.