I don't know about other countries, but in US, the professors usually get ~3 months in summers and ~1 month in winters, not that they take them. I am talking about research universities here. I don't think it should be any different in Europe, but Asia might be a different story. In India, we get 65 days of vacation which can be taken anytime in summer or winter break.
I like to blog about various topics ranging from education in IITs to social issues in India and US. All opinions and views presented here are my own and not of my employer.