A Christmas Tree'', or (rarely) Yule tree, is one of the most popular traditions associated with the celebration of Christmas. It is normally an evergreenconiferous tree that is brought into a home or used in the open, and is decorated with Christmas lights and colorful ornaments during the days around Christmas. An angel or star is often placed at the top of the tree, representing the host of angels or the Star of Bethlehem from the Nativity story.
Both setting up and taking down a Christmas tree are done on specific dates. In Europe, when the practice of setting up evergreen trees originated in pagan times, the practice was associated with the Winter Solstice, around December 21. Tree decoration was later adopted into Christian practice after the Church set December 25 as the birth of Christ, thereby supplanting the pagan celebration of the solstice.
Traditionally, Christmas trees were not brought in and decorated until Christmas Eve (24 December), and then removed the day after twelfth night (6 January); to have a tree up before or after these dates was even considered bad luck. Modern commercialisation of Christmas has resulted in trees being put up much earlier; in shops often as early as late October (in the UK, Selfridge's Christmas department is up by early September, complete with Christmas trees). Some households in the U.S. do not put up the tree until the second week of December, and leave it up until the 6th of January (Epiphany). In Germany, traditionally the tree is put up on the 24th of December and taken down on the 7th of January, though many start one or two weeks earlier, and in Roman-Catholic areas the tree may be kept until late January. In Australia, the Christmas tree is usually put up on the 1st of December, which occurs about a week before the school summer holidays; except for South Australia, where most people put up their tree after the Adelaide Credit Union Christmas Pageant, which is in early November. Some traditions suggest that Christmas trees may be kept up until no later than the 2nd of February, the feast of the Presentation of Jesus in the Temple (Candlemas), when the Christmas season effectively closes.Superstitions say it's a bad sign if Christmas greenery is not removed by Candlemas Eve.
Decoration and ornaments
Tinsel and several types of garland or ribbon are commonly used to decorate a Christmas tree. Delicate mould-blown and painted coloured glassChristmas ornaments were a specialty of the glass factories in the Ore Mountains in the late 19th century, and have since become a large industry, complete with famous-name designers. Lighting with candles or electric lights (fairy lights) is commonly done, and a tree topper completes the ensemble.
Silvered saran based tinsel was introduced later, which many have found to be unsatisfactory, since it did not drape well, leading to the demise of tinsel in tree decorating in the United States (it remains popular in many European countries). Baubles are another extremely common decoration, and usually consist of a fairly small hollow glass or plastic sphere coated with a thin metallic layer to make them reflective, and then with a further coating of a thin pigmented polymer in order to provide coloration.
Individuals' decorations vary widely, typically being an eclectic mix of family traditions and personal tastes; even a small unattractive ornament, if passed down from a parent or grandparent, may come to carry considerable emotional value and be given pride of place on the tree. Conversely, trees decorated by professional designers for department stores and other institutions will usually have a "theme"; a set of predominant colours, multiple instances of each type of ornament, and larger decorations that may be more complicated to set up correctly. Some churches decorate with Chrismon trees, which use handmade ornaments depicting various Chrismon symbols.
Many people also decorate outdoor trees with food that birds and other wildlife will enjoy, such as garlands made from unsalted popcorn or cranberries,orange halves, and seed-covered suet cakes.


