There are seven days in a week because of biorythmnic factors. If you notice each day on earth has a special flavor. It has to do with the mojo, the pyschology of sex, whetted appetites on different days.

Exercize on Mondays is especially good for sexual health which runs the body, that is why they start the work week on Mondays, to get everyones ass in gear.

Then after you have the Monday Mojo fix, that is why you have two for tuesday, you can go buck wild on tuesdays, twice.

Wednesday is hump day, whatever that means.

Thursday is looking to score day, or voyuer day.

And Friday is sexual friction day, or being teased to death

Saturdays are kids day, Paedophiles mow lawn on that day to wake up Vampires to keep them in hell, you want to go out and strangle the pedophile.

Sunday is Gods day the day of rest.

Christians have the Sabbath on Sunday, Jews have the Sabbath on Saturday. It is just a differentiation of worship, Jews would then regard children as gods, or the holy ones, and Christians would regard the Sun as God.

There is no 8th day or 9th, it is life on a loop to loop, same shit different week.