no but some people if they really like Christmas then they might....
This all depends on the individual family, as there is no Mormon religious custom about holiday decorations. Some families like to leave their Christmas decorations up longer than others. I grew up a Mormon, and we always took our Christmas decorations down the day after Christmas. Now that I am grown, I usually take my Christmas decorations down on New Years Day. Most facilities owned by the Mormon Church that decorate for Christmas take their decorations down shortly after New Years Day, which is customary for most people in the United States. Maybe the Mormons you know are either too lazy to take down their Christmas decorations, or they love Christmas so much that they don't want to take them down?
Some popular Christmas decorations in the UK are the Christmas tree, the star, and green or red lights. The decorations used in the UK are the decorations primarily used throughout the world well celebrating Christmas.
You can find unique Christmas decorations and ornaments at http://www.squidoo.com/christmas-tree-themes. There are also gothic Christmas trees and decorations. Try http://www.squidoo.com/GothicChristmas
Some ideas for decorations for Christmas cakes are to make a Christmas scene from icing to adorn the top. A Christmas tree, a representation of some presents under the tree complete the scene.
Unique and unusual Christmas decorations can be a lot of fun. You can find some examples at http://www.toxel.com/inspiration/2010/12/25/unusual-christmas-decorations/, and http://www.squidoo.com/christmas-tree-themes.
Not all people decorate their houses for Christmas but most people put up lights on their house and some put decorations up in their yard.
No, it is not against the law. Some people take them down before that, some take them down the day after, some people leave them up for a long time after that. There is no law about it. It just makes sense to have them up during Christmas, so at least from Christmas Eve to the 6th of January. You are not breaking any law by doing it differently.
Christmas ornaments can be some of the easiest and most fun decorations to make. You can find easy to follow instructions at familyfun.go.com and bhg.com/christmas/ornaments/.
Halloween decorations for your christmas tree could be as simple as popcorn balls, some fake webbing, and candy corn decorations. Filling gloves with popcorn is also a good idea.
A good place to try trading some of your Christmas decorations for Halloween decorations would be Craigs List. You may also want to consider donating them to a store like Savers. They will give you a store credit that you can then use to purchase Christmas decorations.
You can purchase Christmas tree decorations in many locations. Many stores carry new decorations. Some of these stores include: Walmart, Target, and Pottery Barn.
Look on Martha Stewart, Southern Living and HGTV websites for lots of ideas for Christmas decorations. You can also try the Amazing Christmas Ideas website. If you just want to purchase the decorations, try a Christmas shop, since they may carry unique decorations.