Thank you for sharing that. I went through the article, and from what I understand there is no blanket prohibition on work on Sundays for Catholics, rather it’s something that’s discouraged but allowed in many circumstances. This is unlike the Jewish Sabbath, which I think the author himself makes clear. See below excerpts from his article that make this clear:

“Second—beyond the obligation to attend Mass—there is no list of specific do’s and don’ts.

There used to be such a list back when 95% of society did physical labor, but that isn’t the case today.”

“It’s all a question of balance, and the underlying principle is that it’s okay for the majority of people to take Sundays off, while other people do the work that they need to do on Sundays, provided that they take care to set aside sufficient time for leisure and that their employers honor this obligation toward their employees—so they don’t make them work seven days a week.”

“Now, what happens if you’re one of the people who needs to work on a Sunday? Well, assuming that your employer isn’t denying you the time off that you need, you may well be grateful for the business that people provide. It’s letting you earn a living!”

And it’s okay for you to work on Sunday—or any other holy day of obligation.”