Desktop Wallpaper Calendar shows a transparent calendar on the desktop. 

The application's main window contains also the setttings located in tabs. There you can change almost anything: calendar entries, image settings, program behaviour, etc. 

Using Desktop Wallpaper Calendar's settings tabs you can modify every aspect of desktop calendar's appearance. 

From the Image tab you can change contrast, brightness, gamma and also what picture you want as a wallpaper. 

The Application tab can be used to change program related settings such as startup auto loading.