
. . . back when I used to hang around churches.
WHAT IF you're scheduled to work on Sunday? And the question this implies: Is the old Sabbath still in effect today for Christians?
My answer usually goes something like this: I don't think so (read this to find a good reason). But you are indeed to reserve and guard the time for the gathering of the assembly, which, in God's wisdom and since God raised Jesus from the dead on the first day of the week, happens to be Sunday (and it's no small fact that the church eventually confirmed this day too). The day itself isn't sacred. The time and space set aside for the gathering of the elect is.
This is why Christ's disciples "need corporate worship to keep them strong" (as commonly expressed)....