Did you observe it?
AV and myself are not positing it or making it up. It is recorded in the history of Israel through God's word who was there and created it himself.
Genesis 1:5
And God called the light Day, and the darkness he called Night. And the evening and the
morning were the first day.
Genesis 1:16 And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
17 And God set them in the firmament of the heaven to give light upon the earth,
18 And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good.
19
And the evening and the morning were the fourth day.