They will be entitled to official employment contracts, health insurance and sick days.
Archived version: https://web.archive.org/web/20241201042303/https://www.bbc.com/news/articles/c5ygn31ypdlo
SpinScore: https://spinscore.io/?url=https%3A%2F%2Fwww.bbc.com%2Fnews%2Farticles%2Fc5ygn31ypdlo
So the thing is that for a recent hire most companies, especially small ones, don’t know about the supplementary days. That makes for an awkward conversation immediately when you start.
The only real source is a government website with no good law citations that says ambiguous shit, and the actual law, available in Dutch or French, but the legal text is very hard since it’s a modification to an older royal decree, so you have to read the two together.
Ask me how I know. Capital of the EU my ass.