Pentecost (“the fiftieth [day]”) is the Greek name for Shavuot, the Feast of Weeks, a prominent feast in the calendar of ancient Israel celebrating the giving of the Law on Sinai. This feast is still celebrated in Judaism as Shavuot. Later, in the Christian liturgical year, it became a feast commemorating the descent of the Holy Spirit upon the Apostles and other followers of Jesus Christ (120 in all), as described in the Acts of the Apostles 2:1–31. For this reason, Pentecost is sometimes described by some Christians today as the “Birthday of the Church”. This time in the liturgical year is also called Ordinary Time because no festivals such as Christmas or Easter occur during this time. Otherwise, it is an active time in the church as we continue to be God’s disciples in the world.