I have James Jordan's permission to republish this post from the WrightSaid list:

My thought is this: that the Lord's Day is the Day of the Lord (identical in Greek). to understand it aright, one must first grasp the LD in the OT, which is not quite the same as the sabbath. For starters, it is not a 24-hour block of time, but any time when God draws near. Hence, the LD is actually the time of the covenant-renewal worship assembly -- in America from about 11-12 on Sunday, or thereabouts. John was in Spirit in the LD, that is, in the worship service, not "sometime during a 24-hour day called the LD." IMO, it is incorrect to refer to Sunday as "the LD."

It's like baptism. NT baptism is baptism, not circumcision. It subsumes circumcision into it, but it is primarly the fulfillment of all the OT baptisms, and the NT refers to these far more than it refers to circumcision.

I am unsure the extent to which, or even if, the NT LD subsumes and transforms the OT sabbath. Maybe it does, analogous to how NT baptism does circumcision. But as regards liturgical-religious observance, Paul seems, as Rance said, to let the sabbath go.

But positively as to sabbath, I submit that as long as we still live in this world, the sabbath rules have much to teach us. We still have our old bodies and still live in a world of days and weeks, and months and years. To "keep our bodies in subjection" we need to consider the rules for the original creation. But these are applied by us via wisdom, not as under law. (The same is true of ALL the laws given to Israel, I hasten post-theonomically to add -- they are not to be ignored, though we are not "under" them.)

Hence there is much to be said to thinking creatively about applying the sabbath rules in a modern society, and much to be said for blue laws that force employers to grant rest one day in seven to their servants.

FWIW.

JBJ

This fits in so well with everything else I have thought (and suspected) that I am immediately convinced.