Yes, I know, I 've started a post with an absolutism, but hear me out:
*]We do not (and cannot) know with certainty on which day of the week God rested after Creation because Scripture does not tell us. (This also require belief in a literal interpretation of Genesis, which the Catholic Church does not support.)
*]The traditional Jewish calendar is lunar; the modern calendar is solar. There are inherent discrepancies between the two systems.
*]The Earth’s orbit around the Sun requires 365.25 solar days, which is why we have Leap Years - a relatively recent invention. Since we haven’t been using the Leap Year correction continuously since the time of Genesis, we don’t know how far off God’s original timeline we’ve drifted.
*]We have had three major changes to the calendar: moving from lunar to solar (Gregorian), moving from the Gregorian to the Julian calendar, and the two-week fast-forward that brought about April Fool’s Day. Changing the basis of our calendars would have hopelessly complicated things.[/LIST]It may well be that Adventists have addressed this issue, but I suspect that since the Adventist church is relatively recent, they simply started out following the Jewish community’s schedule.
Since the Catholic Church celebrates the Sacrifice of the Mass every day - including Saturday - doesn’t this make the Adventists’ condemnation of us a moot issue?