The celebrations of Shavuot and Pentecost are different, but actually are the same. Shavuot celebrates the giving of Torah, the Word of God in their midst. Jesus is the Word (John 1:1-14). Pentecost celebrates the giving of the Holy Spirit to all who believe and the Holy Spirit is God. Torah is the Word of insrtuction from God and the Holy Spirit is the teacher. And so much more.