Ciao! How are you doing? We are in the last days (or better say hours) of the years and here you can find some good congratulations to use in Italian:
Auguri di Fine anno! Happy new year!
Buone feste! Good festivity!
Buon anno! Have a great year!
*Buon San Silvestro! Good San Silvestro’s Day!
I think there are some others but these ones are the most common (San Silvestro is more a Catholic culture then the others ahah). Do you know some others? Put on the comments!