Pagan Daybook is a screensaver and calendar that will keep track of the days of the week. It uses the ancient and modern tides and the pagan festivals and observances that fall on each day of the year.
Far more interesting than a conventional calendar, it's something unique to put in the Startup group of Windows. Never miss another solstice again... or, perhaps more importantly, another saturnalia.
Pagan Daybook can be configured both to appear on command - whenever you run it, or every morning when your computer boots up - and as a conventional screen saver, whenever your system has been idle for a predetermined period.