During the four Sundays of Advent, most churches focus on a particular theme from the life of Christ, such as hope, love, joy and peace. On the Advent wreath, each Sunday is represented by a purple or a blue candle, with the Sunday that focuses on joy being represented by pink.
During each Sunday at church, a new Advent candle is lit. In the middle of the Advent wreath is a white candle, known as the Christ candle, that is lit on Christmas Eve or Christmas Day. The purpose of celebrating Advent is to help churchgoers realize their yearning for God to join them in the form of Jesus Christ.