[muawiyah]

The “heat” starts with the arrival of the Sun. That occurs in the first creation story right after the arrival of the plants (who then spend the evening in total darkness ~ no Sun ~ on a cold planet without heat).

[Fichori]

“The “heat” starts with the arrival of the Sun.” [excerpt]

Does it actually say that the Sun gives heat in Genesis 1?

Or did you just assume that it did.