'Week' in the Bible

On the third day of that week there was a wedding in Cana of Galilee. Jesus' mother was there,

The first day of the week cometh Mary Magdalene early, when it was yet dark, unto the sepulchre, and seeth the stone taken away from the sepulchre.

Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you.

A week later, his disciples were again inside, and Thomas was with them. Even though the doors were shut, Jesus came, stood among them, and said, "Peace be with you."