is a unique Danish tradition started in the early 20th century. Julehjerter or pleated Yule hearts are handmade decorations which are hung on the Yule tree. Children together with other members of the family create the hearts from glossy paper in various colours. Hearts and kræmmerhuse, decorated paper cones, are often filled with treats when hung on the tree. Another traditional decoration that is put on the tree are strings with small Danish flags attached to it. St. Lucia Day is celebrated on 13 December. History Until 1770, the Christmas holidays included 2nd day of Christmas and Epiphany on 6 January (celebrated on the eve of 5 January). Afterwards, only 1st and 2nd Christmas Day are holidays, and 6 January is now a celebration day. The first Christmas tree in Copenhagen was lit in Ny Kongensgade in 1811. Christmas trees became popular among the middle class from about 1820 and hence spread to all levels of society. See also Christmas worldwide Jól (Iceland) Jul (Norway) Julemanden Julenisse Juhl (surname) Yule Sources danmarkshistorien.dk: Jul i vikingetiden og den tidlige middelalder, Aarhus University . About Danish Jul in the Viking Age and early Middle Ages. danmarkshistorien.dk: Julestuen - danske juletraditioner i 1600- og 1700-tallet, Aarhus University . About Julestuer and Danish Christmas traditions in the 1600 and 1700s. References Bibliography Feilberg, Henning Frederik: Jul I-II (1903) Denmark December observances Yule