did you skip the first two chapters of genesis?
notice how the word "day" is used...
If you really take notice, you might see what other readers have since antiquity.
2:4b Starts a second version (J) of the creation story. This one does not use the Sabbath (7 day) week motif but rather simply says God created/ordered the earth and heavens in a day.
The differences do not end there. In the second story, the first living thing God makes is man, then the garden of Eden and plants (no such garden in first version(P)) and then animals which are offered to the man as a partner, but none are found suitable, so then God makes a woman. This is obviously very different from the P version. The P stands for 'Priestly', as this author, unlike J, has a focus on worship (including Sabbath) and Temple functions throughout the Torah.
My point is that the authors had very different schema. One says 7 days one says 1.
Their stories having been collected and laid side by side emphasizes that the compiler recognized their distinctiveness. Do you?