Ljubljana, Slovenia's capital, celebrates New Year's Eve with parties and concerts. While the main square is the center of activities, festivities can be enjoyed in other areas of the city, too.
Slovenia celebrates Christmas on December 25th. Be sure to visit the Ljubljana Christmas Market if you're in Slovenia during the month of December to experience Christmas the Slovenian way.
If you're traveling in Slovenia when a holiday occurs, be aware that public institutions and shops may be closed.