In 1600s Germany, Christmas trees were adorned with apples to celebrate Adam and Eve Day on December 24. This tradition featured "Paradise Trees," used in plays retelling the story of Adam and Eve. Apples symbolized the forbidden fruit, and trees were displayed in homes for the holiday. By the 1700s, decorations included gilded nuts and red paper strips, while the 1800s saw German settlers introduce Christmas trees to the U.S. Over time, glass ornaments replaced edible decorations, transforming tree decorating into the diverse and festive tradition enjoyed today, with each family creating their unique holiday designs.