It is usually a horizontal evergreen wreath with four candles and often, a fifth, white candle in the center. Beginning with the First Sunday of Advent, the lighting of a candle can be accompanied by a Bible reading and prayers. An additional candle is lit during each subsequent week until, by the last Sunday before Christmas, all four candles are lit. Many Advent wreaths include a fifth, Christ candle which is lit at Christmas Eve or Christmas Day.
The custom is observed both in family settings and at public church services.