'First Day of the Week' in the Bible

On the first day of the week, very early in the morning, while it was yet dark, Mary Magdalene came to the tomb and discovered that the stone had been removed from the tomb.

On the evening of that same day, the first day of the week, although the doors of the room where the disciples gathered had been locked for fear of the Jews, Jesus came, and there he stood among them, saying. "Peace to you!"