This makes me crazy. Everytime I see one of those “I quit today” text message posts, the poster always try to justify themselves about why they can’t go to work/cover a shift.
If you’ve requested a day off and it’s been approved, you are good to do whatever you want on that day. Yesterday someone texted their boss they couldn’t because they had a flight, today because they had to put their dog down. You don’t have to.
It’s Illegal in some countries for a boss to contact employees when said employees are off.
You don’t have to feel bad/guilty, you requested something that’s been approved, now it’s your boss’ business to find someone on those days.
“I’m sorry but I have a day off and I’m taking it”. That’s all you need. It might look better to tell your boss you have si or ça, but don’t waste time with a shitty boss, you won’t go far with them anyways.