[Philsworld]

Yes. There are literally hundreds of quotes just like you posted. Thank you for the resource site.

[Songcraft]

Yes, I found a bunch of links even for just that one Catechism source online, including this version, which allows you to just click on specific sections of the Catechism -- the same one I linked to earlier at the University of Notre Dame.

Links:

"The Convert's Catechism of Catholic Doctrine"

"The Ten Commandments"

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The Third Commandment What is the Third Commandment?

The Third Commandment is: Remember that thou keep holy the Sabbath day.

Which is the Sabbath day?

Saturday is the Sabbath day.

Why do we observe Sunday instead of Saturday?

We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea (A.D. 336), transferred the solemnity from Saturday to Sunday.

Why did the Catholic Church substitute Sunday for Saturday?

The Church substituted Sunday for Saturday, because Christ rose from the dead on a Sunday, and the Holy Ghost descended upon the Apostles on a Sunday.

By what authority did the Church substitute Sunday for Saturday?

The Church substituted Sunday for Saturday by the plenitude of that divine power which Jesus Christ bestowed upon her.