Christmas and New Year in Ro

Hello. I lived in Romania before (2012-2014) i was in an international environment living in a dorm in Arad. we used to go back to our countries on christmas and the ones who stayed ,celebrated new year in the dorm .
I was wondering if in small touristic towns such as Sibiu, Brasov i can find christmas concerts, celebrations? Or it will be boring and better choose a bigger city?
P.s. trains work on holidays as well??
Thanks ☺✌

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