[TomMarius]

I live in one of these 'more advanced countries'. The system is bad, expensive and has many issues, but that doesn't matter for this discussion. What matters is that in these more advanced countries, for example in the one where I live, it's actually very normal to tell your manager about this so they can plan for that - and then there are no issues on either side.

BTW the paid leave is not paid by the employer, it's paid out of mandatory government insurance.

EDIT: please reply and discuss before downvoting. Downvoting adds nothing to the discussion.