[AppyPappy]

The Sabbath is the Seventh day

Are you assuming the universe was formed on a Monday?

[safisoft]

The Sabbath is the Seventh day
Are you assuming the universe was formed on a Monday?

Let's count:
1st Day (common Sunday)
2nd Day (common Monday)
3rd Day (common Tuesday)
4th Day (common Wednesday)
5th Day (common Thursday)
6th Day (common Friday)
7th Day (common Saturday)
Six days shall you labor, on the seventh you shall rest. Guess that makes it the common Saturday.

As for "when one should start counting" - this is understandable, unless you have no contact with Jewish people. Believe me, today's Monday, is EXACTLY the same 2nd day of the week it has been for millenia. I would ASSUME that Jesus knew which day was the Sabbath, and it being the 7th day - and as anyone who knows Jewish people knows... there is NO way in the past 2,000 years someone lost count of which day was the 1st, and which was the 7th.