'Week' in the Bible
Now on the first day of Unleavened Bread (Passover Week) the disciples came to Jesus and asked, “Where do You want us to prepare for You to eat the Passover?”
Now after the Sabbath, near dawn of the first day of the week, Mary Magdalene and the other Mary went to look at the tomb.
Very early on the first day of the week, they came to the tomb when the sun had risen.
[Now Jesus, having risen [from death] early on the first day of the week, appeared first to Mary Magdalene, from whom He had cast out seven demons.
But on the first day of the week, at early dawn, the women went to the tomb bringing the spices which they had prepared [to finish anointing the body].
Now on the first day of the week Mary Magdalene came to the tomb early, while it was still dark, and saw the stone [already] removed from the [groove across the entrance of the] tomb.
So when it was evening on that same day, the first day of the week, though the disciples were [meeting] behind barred doors for fear of the Jews, Jesus came and stood among them, and said, “Peace to you.”
and when he saw that it pleased the Jews, he proceeded to have Peter arrested as well. This was during the days of Unleavened Bread [the Passover week].
We sailed from Philippi after the days of Unleavened Bread (Passover week), and within five days we reached them at Troas, where we stayed for seven days.
Now on the first day of the week (Sunday), when we were gathered together to break bread (share communion), Paul began talking with them, intending to leave the next day; and he kept on with his message until midnight.
On the first day of every week each one of you is to put something aside, in proportion to his prosperity, and save it so that no collections [will need to] be made when I come.