I do not think the day of the week is the point of Sabbath, honestly
I just feel we are to work six days and work the seventh
during biblical times their culture worked six days and rested on the seventh, it is the pattern that makes it Sabbath, not the name of the day
in our times, our general first day of work is monday, making our seventh day Sunday
but even if one worked, tuesday through sunday and rested monday, they would be living by the commandment to rest on the seventh day
I doubt God is hung up on mans calendar, or the names of our days ...
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No doubt.
That can work too, as long as we rest for one day.
On the 7th day, whatever day may be for some.
The purpose of it is deeper and should
clear many doubts, and/or help heal the minds,
especially humans, of stress as example.
For some, REST can heal bodies, souls or minds
But look at it from a different view.
No 7 has also a deeper multiple meaning from
god's point of desire for humans & purpose.
Take Agricultural for example.
Good farming land is the one who
is cultivated for 6 years, and
given a rest for one year.
That makes 7 years.
Peace.
7 is a huge deal