Greek civil servants get three days leave for donating blood.
A civil servant would be allowed to donate blood twice a year. This means, he could claim an extra 6-day leave. I cannot tell, if this blood-donation benefit has been scrapped as well.
source: keeptalkinggreece, 09/2013
I was not able to verify if civil servants are still allowed to take these holidays. If they are, is there any other country in Europe with such a high reward (in terms of holidays)?