The Calendar Calculator is 100 % web-based, and is therefore compatible with all versions of Windows, Mac, and Linux. It is compatible with most mobile platforms, although the results may not fit on screen withouut scrolling.
Use of the Calendar Calculator
Select a Locale and a Function, then click the Update button.
In most cases, the use of this Calendar Calculator is as simple as selecting the desired function, and clicking update. This calculator can display any month or year, or perform calculations (addition and subtraction) on dates.
For dates between October 4, 1582 and September 14, 1752, be sure to select the correct locale, since the Gregorian Calendar was adopted at different times in different locales.
Note that this Calendar Calculator is provided without any warranty, and should be used at your own risk. For more details, Information about the Calendar Calculator.