In the UK (or Great Britain), families often celebrate Christmas together, so they can watch each other open their presents!
Most families have a Christmas Tree (or maybe even two!) in their house for Christmas. The decorating of the tree is usually a family occasion, with everyone helping. Christmas Trees were first popularised the UK by Prince Albert, the husband of Queen Victoria. Prince Albert was German, and thought that it would be good to use one of his ways of celebrating Christmas in England.
Most villages, towns and cities are decorated with Christmas lights over Christmas. Often a famous person switches them on. The most famous Christmas lights in the UK are in Oxford Street in London. Every year they get bigger and better. Thousands of people go to watch the big ‘switch on’ around the beginning of November.