Dynamic Wallpaper is a Linux application that displays a wallpaper in svg format on your desktop based on the weather, moon phase, time of day, etc. and it also supports themes. For Ubuntu, you can find a .DEB package on Getdeb. After installing it, you can run the application by going to Applications > Accessories > Dynamic Wallpaper. You can set the location (if you don't know the code, you can click the link in the options menu - see in the above screenshot), the units, te