This applet is from the compact disk that accompanies the book Calendrical Calculations: The Millennium Edition by Edward M. Reingold and Nachum Dershowitz (Cambridge University Press, second printing, 2002). It can still be run with CheerpJ Applet Runner under Chrome. For more information, and any errata, see the site http://www.calendarists.com. For details about these dates, click here.