Taken from: https://www.newadvent.org/cathen/14506a.htm Tenebræ is the name given to the service of Matins and Lauds belonging to the last three days of Holy Week. This service, as the “Cæremoniale episcoporum” expressly directs, is to be anticipated and it should be sung shortly after Compline “about the twenty-first hour”, i.e. about three p.m. on the eve of the day to which it belongs. … Continue reading Traditional Tenebrae