Q: Does the Catholic Church actually believe in LEGISLATING Sunday Sacredness?
A: from Dies Domini:
#67- Therefore, also in the particular circumstances of our own time, Christians will
naturally strive to ensure that civil legislation respects their duty to keep Sunday holy.
#62- It is the duty of Christians therefore to remember that, although the practices of the Jewish Sabbath are gone, surpassed as they are by the "fulfilment" which Sunday brings, the underlying reasons for keeping "the Lord's Day" holy — inscribed solemnly in the Ten Commandments — remain valid, though they need to be reinterpreted in the light of the theology and spirituality of Sunday...
A: from Dies Domini:
#67- Therefore, also in the particular circumstances of our own time, Christians will
#62- It is the duty of Christians therefore to remember that, although the practices of the Jewish Sabbath are gone, surpassed as they are by the "fulfilment" which Sunday brings, the underlying reasons for keeping "the Lord's Day" holy — inscribed solemnly in the Ten Commandments — remain valid, though they need to be reinterpreted in the light of the theology and spirituality of Sunday...
Who opposeth and exalteth himself above all that is called God,
or that is worshipped;
so that he as God sitteth in the temple of God,
shewing himself that he is God.
2 Timothy 2:4
"Dies Domini is an apostolic letter promulgated by Pope John Paul II on July 30, 1998. In this doctrine, Pope John Paul encourages the Catholic population to 'rediscover the meaning' behind keeping the Lord's Day holy." wikipedia