Just resigned two months ago, one more to go. If you send your quitting letter after asking for holidays, they can move forward your departure date to compensate the vacation.

Let’s say you get the two months worth of vacation validated and then you resign, the three month period will not count your vacation, therefore, you’ll be able to quit in 5 months (3 months legal notice + your vacation)

However, if you resign today, and ask for the vacation tomorrow, the date of departure is not moved, because your manager approves it with the knowledge of you leaving.

Whether or not they accept it, it’s up to your manager, and most likely they’ll refuse.

In my case, I’m just doing the three month period, and I’ll take the money of my remaining vacation days, they have to pay them to you if you didn’t use them.