Earlier quoted context omitted.
> Per my knowledge US is the only country which stubbornly (and illogically) considers Sunday to be the first day of the week /Officially/ almost everyone has standardized on ISO 8601 where Monday = 1 and Sunday = 7. But unofficially, not really. The week is still popularly understood to start on Sunday in English Canada, and probably some other parts of the English-speaking world. A quick check of Wikipedia suggests…
"Sat and Sun constitute the weekEND, right?" "Of course." "And Sunday is the 7th day, the day of rest?" "Yeah, that's what they preach at my church." "What about your workplace?" "Everybody knows the standard workweek is Mon-Fri. What's your point?" "Ok, so we're agreed the weekends include Sunday, your Bible says Sunday is the 7th day, and the workweek starts on Monday." "Yep." "So printed calendars and day-planners…
My own personal opinion: it matters not what day you consider to be the sabbath, but it does help when a community agrees on a day and goes along with it. So for me, Sunday it is. (It also doesn't matter how a calendar is printed; it could start on Wednesday for all I care. It'd be weird, but it wouldn't change anything.)