Finally the Sun is created on the fourth day!
The issue here is most Christians believe that all planets, sun, moon, stars etc were created on the frist day itself. Gen 1:1: God created the heavens and the earth. Everything else apart from the earth can be included in the term heavens.
Gen 1:3: Light from the already existing sun now penetrated to the earth through the cloud layers, even though the source of this light was not seen. Mostly like opening the window curtains and letting the light from the sun come in.
Gen 1:14-16, Here the hebrew word ʽa·sahʹ is used which means 'make' and not create ('bara'). So God did not create the sun and the moon, but rather made them discernible to humans from the earth in a way that they could observe their movements and understand climatic patterns.