Which of course I did.
Even though it was already 15:42, either way, I started working at 16:12.
So seven hours yesterday (they asked if I'd work till eleven, which of course I agreed too. And yes I know, I'm a disgrace to slackers everywhere for doing so)
I can now also work today, normal hours, two till ten in the afternoon, though there's still no work on friday. But at least things should be back to normal on monday.
Thank you people at Opel.