Fourth day

1:19 And the evening and the morning were the fourth day.

The fourth day is the first with a sun.  Days here are clearly tied to cycles of light and darkness: evening and morning.  But evening and morning in my worldview come from the rotation of the earth bringing the sun (the main light source) into or out of view in a particular area.  The worldview described here is clearly distinct from mine; the first three days in particular don't even have a sun.

The geocentric worldview ("the sun orbits the earth; the sun being up causes day, and the sun being down causes night") predates the heliocentric one ("the earth rotates relative to the sun; the sun being in view causes day").  But the view here seems to even predate the geocentric one.  Here it says something more like, "When it happens to be day, the sun comes out to rule the day."  Of course, it also says the purpose of the sun is to light the earth, which seems to conflict.

And the writing and the posting were the nineteenth entry.