TENEBRÆ (Literally, Darkness). The name of a Service appointed, in the Roman Breviary, for the three most solemn days in Holy Week, and consisting of the conjoined Matins and Lauds,See Matins, and Lauds. for the Thursday, Friday, and Saturday, which are sung ‘by anticipation
’ on the afternoons of the Wednesday, Thursday and Friday. The name is taken from the opening sentence of the Responsorium which follows the Fifth Lesson on Good Friday, Tenebrœ factœ sunt—There was darkness...