Calendar 2000 is a Windows desktop utility that displays a monthly calendar similar to checkbook calendars. The software allows users to define their own important dates and holidays.

While it doesn't offer full scheduling capabilities, you can define your own holidays and other important dates. Additionally, the program is excellent for quickly checking the date or figuring out the day on which a particular date occurs.
One great feature of Calendar 2000 is its extensive range: you can display and print monthly calendars from way back in January 1583 all the way up through December 3000. And with such a small program, it's easy to configure it to run directly from the Taskbar icon tray.
Overall, if you're looking for a simple and reliable calendar utility, you can't go wrong with Calendar 2000.
Version 4.9: Adds support for Windows Vista, 7 and 8 operating systems.
Version 4.6: This is a maintenance release.
Version 4.5: This is a maintenance release.
Version 4.4: This is a maintenance release.
Version 4.3: This is a maintenance release.