"The Sabbath was made for man, not man for the Sabbath" implies that the Sabbath was made for the benefit of man, for his use, and not vice versa. Man is not the slave of the Sabbath.
So Prober...Does it matter which day is observed as Sabbath, or is any seventh day good? Like, if I start on Tuesday, then Monday would be my Sabbath. Or if I were to start my work week on Monday, then Sunday would be my Sabbath. Is that right?
God "rested" on the seventh day of creation and asked that we do likewise to honor him as the creator. Resting on Sabbath is (or should have been) a weekly "ceremony" since the beginning of time.
This day is Saturday.
As God's example suggests, it does matter which day we keep.
I wouldn't beat anybody over the head with this. For me, it's a cool thing (once you get used to it). I look forward to turning off the TV on Friday night, having the house all clean and settled, sitting quietly reading, being with the church on Sabbath, having pot luck lunch, taking a nature walk and in general making a quiet space in my noisy week.
Sunday, of course, is for GOLF!
We should worship God every day - it's just that Sabbath is special. Yeah, it's a ceremonial thing.