Celebrations begin with Chlausjagen, the Feast of St Nicholas, on December 6, when Sternsingers dressed as the Three Kings parade through the cobbled streets singing carols. At dusk, Santa rides through the city on a tram decorated with fairy lights. Children are invited on board to ride with him. The air is filled with the scent of cinnamon and mulled wine. It's everything Christmas should be — magical, communal and family-friendly.