Since you folks enjoy analyzing theory's on creation, here's a new one for you.
Moses was the author of the book of Genesis. God inspired him to write it. Each day is not the period of time that it took for activity to happen. It is the length of time that it took for God to show Moses the activity that happened. Remember that Moses, many years after the creation, wrote the first five books to a group of people who only understood time as cycles of the moon and sun. Most only understood time as the cycle of the sun. It makes perfect sense that the people accepted Moses's words as day by day, even though he was describing distinct periods of time.
Moses was the author of the book of Genesis. God inspired him to write it. Each day is not the period of time that it took for activity to happen. It is the length of time that it took for God to show Moses the activity that happened. Remember that Moses, many years after the creation, wrote the first five books to a group of people who only understood time as cycles of the moon and sun. Most only understood time as the cycle of the sun. It makes perfect sense that the people accepted Moses's words as day by day, even though he was describing distinct periods of time.