'First Day' in the Bible

And the first day of unleavened bread, when they killed the passover, his disciples said unto him, Where wilt thou that we go and prepare that thou mayest eat the passover?

And very early on the first day of the week, they come to the tomb when the sun was risen.

So they went out, and ran from the tomb, for they were trembling and amazed; and they said nothing to any one, for they were afraid??9 Now after his resurrection, early on the first day of the week he appeared first to Mary Magdalene, from whom he had driven out seven demons.

Now when he was risen early on the first day of the week, he appeared first to Mary Magdalene, from whom he had cast out seven demons.