WallCalendar - Version 1.2 An easy to use utility for the system tray to manage Windows wallpapers with thumbnail preview. Pictures can be added with drag & drop. In addition to the usual features as tile / center or change wallpaper pictures after a certain time WallCalendar has additional calendar functions. You can have different pictures e.g. on Monday's compared to Friday's or in March or in the afternoon. This gives more flexibility to see the pictures you like.