 However, on some occasions that are heavily associated with Advent, such as the Rorate Mass (but not on Sundays), white is used.On the third Sunday of Advent, Gaudete Sunday, rose may be used instead, referencing the rose used on Laetare Sunday, the fourth Sunday of Lent.A rose coloured candle in Western Christianity is referenced as a sign of joy ("Gaudete") lit on the third Sunday of Advent.