In SMWTTFS the Saturday and Sunday are at the ends as in limits of the week, and furthermore it makes sense for there to be two "weekend" days like there are two bookends. In MWTTFSS Sunday is the only actual end of the week with Saturday being included just because(?) and Monday being "weekbegin", which isn't really a word in English.
So based on this SMWTTFS seems more logical and sensible at least in English.
I mean I get it that Sunday being the first day of the week is a leftover from religious past but this does not make it any more logical when applied to the workweek/weekend cadence. Moreover, most of European countries where workweek starts on Monday already consider it the 1st day of the week, why can't US do the same and be done with it?
What benefit would we get from doing so? Metric I can understand the benefits of, though I also see why Americans are resistant implementing such a disruptive change in daily life. But shifting our definition of the week by one day provides no benefit that I can see, nor does keeping it the way it is cause any harm. The primary argument I’ve seen in these threads is “because the word ‘weekend’ doesn’t make sense,” but that’s not very convincing to me since I and every other American I know find the phrasing perfectly natural—and if we want to make the English vocabulary perfectly ‘logical’ and ‘consistent,’ there are far more disturbing malapropisms in common use to tackle first.
Hebrew words for the week came from Akkadian and sabbath itself can be traced back to the Babylonian loan word for fifteen..mistaken as seven. šabattu is the 15th day of the month, the time of the full moon Vs “sebūtu“ was the 7th day of the lunar quarter.
The Akkadians had no concept of ‘week’. They simply followed the moon. Starting with the new moon, first quarter, second quarter and third quarter. Their festivals were based on the 1, 7 etc and 15 day with the 15th day being observed as the bright full moon.
It must have been from the Babylonians that the Hebrews adopted the 7 day week because they had seen them celebrate the 7th day, “sebūtu“. Altho they probably chose the word for the 15th day/full moon of Babylonian šabattu as it’s closer to Hebrew ‘sabbot’ and their word for ‘rest’. Post exile Hebrews took this to create the Hebrew calender and created sabbot as the 7th day of rest.
The Babylonians celebrated 1, 7, 21 and 28th day after new moon as the beginning of each quarter. Hebrews simply took each quarter to be a slice of time instead of differentiating between the four quarters between two new moons.
The days in Hebrew are simply numbered, First day, Second day etc. except for Shabbat