On vacation

I am on my first official vacation ever. Sure I took days off, had holiday or worked from home before but this is the first time when I filled in "dovolenka", had it signed from my manager and delivered it to our HR person.
The reason is pragmatic - I'm having state exam on Jan 22nd. First I thought I would spare the vacation for something more exciting like traveling, for relaxing and resting from work, but then I counted that I still have 6,5 days of vacation from the last year and I can also take 4 extra days off for overtimes (yay for business trips).
The thing is that we just had 11 days of Christmas free time so there is no need to have a rest from work. To tell the truth, I'd rather be there now, especially when the only plan for upcoming weeks is the silence and boredom in the library.