The season of Advent starts four Sundays before Christmas. Considered the first season of the church year, Advent, which is derived from the Latin word adventus or "coming," prepares us for the arrival of Christ.
During Advent, we quietly make ourselves ready for the wonder of Jesus' birth. Advent is, then, a time of hopeful anticipation of God's coming into our world – and a reminder that He will come again. As a result, Advent liturgies are characterized by a sense of majesty and expectation.
Altar decorations and vestments may be blue or purple. An Advent wreath is used to mark the time of waiting, with some families observing this custom at home as well.
Advent is followed by the celbration of Christ's birth and Christmas.