Boxing Day is sometimes called December 26. Christmas is celebrated on December 25. If Christmas Eve falls on a Sunday, New Year's Eve will be on Wednesday. The tradition of Christmas trees began when Prince Albert introduced them to England. Candy canes are usually used to decorate trees, while mistletoe is associated with kissing under it. Holly is the Christmas plant also called "Christmas berries". Poinsettias are the popular winter flowers. The tree in Trafalgar Square comes from Norway. The first public decorated tree was in Berlin. Mince pies contain dried fruit and spices. Christmas pudding is made 4-5 weeks before the holiday. Christmas cards began in 1843. Children leave Christmas stock