Because the [[Resurrection|Resurrection of Jesus]] occurred at dawn on the First Day of the week, '''Sunday''' (Matthew 28:1-7; Mark 16:2-6; Luke 24:1-5; John 20:1-9; Malachi 4:2), observance of the celebration of the Lord's Resurrection on Sunday, rather than on any other day of the week, and of the immediately preceding Friday as Good Friday in commemoration of his Crucifixion and entombment as the Sacrifice of Atonement for the sins of the world, became the norm as determined by the [[Ecumenical council]] of bishops and legislated by Emperor Constantine as the norm of Christian communion of faith and unity of common ecclesiastical practice throughout the Empire. By this means he sought to end the devastating rioting and loss of life from the feuding of Christian groups who accused each other of polluting the faith with [[Heresy|heterodox]] customs offensive to God. | Because the [[Resurrection|Resurrection of Jesus]] occurred at dawn on the First Day of the week, '''Sunday''' (Matthew 28:1-7; Mark 16:2-6; Luke 24:1-5; John 20:1-9; Malachi 4:2), observance of the celebration of the Lord's Resurrection on Sunday, rather than on any other day of the week, and of the immediately preceding Friday as Good Friday in commemoration of his Crucifixion and entombment as the Sacrifice of Atonement for the sins of the world, became the norm as determined by the [[Ecumenical council]] of bishops and legislated by Emperor Constantine as the norm of Christian communion of faith and unity of common ecclesiastical practice throughout the Empire. By this means he sought to end the devastating rioting and loss of life from the feuding of Christian groups who accused each other of polluting the faith with [[Heresy|heterodox]] customs offensive to God. |