Advent is a period of waiting in anticipation of celebrating the anniversary of Christ’s birth. It is the beginning of the liturgical year for the Western church.
Here is a prayer for the first Sunday of Advent, from the Book of Common Prayer in the Episcopal Church:
Almighty God, give us grace that we may cast away the works of darkness, and put upon us the armor of light, now in the time of this mortal life in which thy Son Jesus Christ came to visit us in great humility; that in the last day, when he shall come again in his glorious majesty to judge both the quick and the dead, we may rise to the life immortal; through him who liveth and reigneth with thee and the Holy Ghost, one God, now and for ever. Amen.