In the beginning the Earth was surrounded by darkness, it was isolated. God then stated "Let there be light" and light appeared. He called this 'light' and 'darkness'. Evening passed and morning came - That was the first day.
The God commanded" Let there be a dome to divide the water". And there was a dome; God named this dome the "sky". Evening passed and morning came-that was the second day.
He commanded that land should appear, and wanted all types of trees to appear that produced seeds and fruits. God was pleased with what he saw. Evening passed and morning came- that was the third day.