The Judeo-Christian bible tells us that god (AKA Allah) created the heavens and the earth in six days and rested on the seventh. In the Quran we can find a verse that supports this claim. On the other hand, the Quran also tells us that Allah created the earth’s mass in two days, the mountains, animals, and food in four days, and seven heavens in two days. In other words, Allah took eight days to create the heavens and the earth. 2+4+2=8.
These are, of course, both false. The “heavens” probably don’t exist, especially not seven of them. One might postulate the universe is still forming, since it’s still expanding and everything within it’s in constant motion. And following the formation of our solar system, the primordial earth formed in during a span of about ten million years, not a week.