In Dutch it's pretty much the same as in English, I suppose.
I typically wish people 'prettige feestdagen' (have a nice holiday period), and most people I know seem to use this. It's also the top result on Google
But 'prettige kerstdagen' (have a nice Christmas) is very common too. Usually followed up by 'en een gelukkig nieuwjaar' (and a happy new year).