The First Friday Devotion in the Catholic Church History of First Friday First Friday devotions among Catholics are related to devotion to the Sacred Heart of Christ. First Friday practices date to the last decades of the 17th century, when Jesus appeared to St. Margaret Mary and spoke to her of His Sacred Heart. Among the promises Our Lord revealed to St. Margaret Mary, the 12th specifically referenced practices for Fridays:In the excess of the mercy of my Heart, I promise you that my all powerful love will grant to all those who will receive Communion on the...