An Anytime Calendar

It wasn't long ago that the Windows operating did not even provide a calendar that could access dates prior to 1980.  Subsequently, that situation has improved; but I offer this attractive option anyway.  It knows every date since 1 a.d.,  and a full-year screen is available with a single mouse click.

Calendar12 requires Windows 2000 or greater, and 1024×768 or greater screen resolution.

Download:    Calendar12.zip     Trust me! no viruses

USEFUL SETUP HINTS

Calendar12 utilizes a console windows that is not of standard size.  It might not display properly on your monitor without some simple adjustment, as follows:

• Create a desktop shortcut for Calendar12.exe.  Double-click the icon to launch the program.  Right-click the colored bar at the top of the program window.  Select Properties from the menu.
• Under the Fonts tab, select 10×20 Raster Fonts.
• Under the Layouts tab, set both the Screen Buffer Size and Window Size to Width=93 and Height=34.  Click OK to exit the dialogue window.
• Left-click the window bar and hold the mouse button down.  Drag the window to the center of your screen, making sure that the entire window is visible.
• Right-click the window bar again.  Select Properties / Layout.  Uncheck the box labeled Let system position window.  Click OK.

The program screen should now be displayed in the same position every time you launch the application.

Usage: When in the program, type 'Y', then 'H' for a repeat of the instructions on setting up an efficient and more attractive interface.  To exit the program, one may simply press <Esc>.

ABOUT THE DATES

The modern Gregorian Calendar was first instituted in 1582, in Italy by Pope Gregory.  At that time, the days of October 5-14 were deleted in order to correct the error accumulated under the Julian Calendar.  Modern computer systems, however, support the belated British conversion date, wherein the days of September 3-13, 1752, were expunged.  My programs conform to this standard.

No attempt is made to accommodate the old-style Julian Calendar.  Other than the missing days, however, the only difference in the Gregorian Calendar is that years evenly divisible by 100 but not evenly divisible by 400 are not leap years (so far, the only such dates are 1700, 1800 and 1900; but 1700 is ignored by the British protocol).

In any case, all calculations are variable by location and nationality, as there was no worldwide standard until the 1920s or so.  In fact, several different calendars remain in use to this day, with discrepancies of up to eight years!