The feast of the Annunciation, the day on which our salvation begins, is so important that in the Byzantine Churches it is never moved, no matter what day on which it falls, even on Good Friday. Why? Because the date of the Incarnation supersedes everything, this feast must be observed. If it falls on Good Friday, then the joyful Annunciation Liturgy is celebrated in the morning, with bright colors per usual. Then the rest of the day is given over to the sorrowful passion of Our Lord.