Matins

Matins is the monastic nighttime liturgy, ending at dawn, of the canonical hours. As standardized in the Roman Catholic Liturgy of the Hours, it is divided into three Nocturns. The name "Matins" originally referred to the morning office also known as Lauds. When the nocturnal monastic services called Vigils or Nocturns were joined with Lauds, the name of "Matins" was applied at first to the concluding morning service and later still to the entire series of Vigils.