[WildTurkey]

day and night were on day one, but the source of the light was NOT the Sun, which was not created until day 4.

You are correct. It was not the sun. It was the headlight of a Martian space vehicle. God just borrowed till he could get around to making a sun.

[JohnnyM]

Please tell me how the Sun can be the source of the light on day 1, yet be created on day 4? This is logically inconsistent.

The source of the light in on day one is God. Revelation 21:23 may shed some light on this (pun intended).

And the city has no need of the sun nor of the moon, that they should shine for it; for the glory of God has enlightened it, and the lamp thereof is the Lamb

JM