@doreen It’s complicated, and I’m not a labor lawyer. But as I understand my country’s system, if you have a single salaried position and your employer compels you to exceed the maximum (or does not actively take steps to curtail your hours if you did it unilaterally), it’s the employer at fault; but if you the worker take two or more different jobs that may or will cause you to exceed the maximum and you don’t report this to the state for evaluation, you the worker are at fault (on top of being on the hook for any violation of your employment contract(s) which likely demand exclusivity).
Not that I’m aware. It’s hard-coded in the law* that Sunday is a day of rest.
Luxembourg is progressive and forward-looking in many ways (totally free public transit everywhere in the country, one of five countries to legalize physician-assisted voluntary euthanasia for terminal patients, an active effort to fully legalize personal recreational use of marijuana, etc.), but there are signs everywhere that we are still, underneath those policies, a fairly traditional and conservative nation with deep roots in Christianity, specifically Catholicism. The majority of our public holidays are Christian holy days (Ascension, All Saints, Whit Monday, etc.). No other religions are recognized in the holiday schedule; the non-Christian days off are strictly secular (e.g. Europe Day, celebrating the European Union).
Beyond strict religion, conservative practices still abound. For example, under Luxembourg’s household tax laws, the primary earner with the higher wage is taxed at one rate, and the secondary earner with the smaller income, if there is one, is taxed at a different, lower rate. My wife’s salary exceeds mine, and she is therefore the primary earner. However, when we first got our tax cards from the state finance ministry, we saw that I had been designated the primary earner, which meant the withholding on our monthly paychecks would be wrong and we’d be hit with a bigger bill at the end of the year. After several weeks wrestling with the bureaucracy, we learned that a public servant had noticed our file and assumed that someone had incorrectly swapped our roles, and “helpfully” switched us “back.” This was fixed and our paychecks were adjusted. Then, the following year when we got our new tax cards, we found it had been “fixed” back to the incorrect arrangement. Not a huge deal, but irritating.
In any case, the point is, no, there’s no exception for non-Christians. The work week is what it is, and it’s unlikely to change soon.
*And in the culture. I’ve heard stories of busybody neighbors calling authorities if you are outside in your own yard on a Sunday performing substantial and highly visible physical labor, even just for yourself, like building a shed or something. It’s never happened to me or anyone I know personally, so I can’t confirm. But the rumors persist.