CalenDates adds years 2005 to 2015 Holidays and Observances to your built-in Calendar. CalenDates uses Natara's DatePak Technology to allow you to easily add any or all National US, Christian, Jewish, Islamic, Holidays and Observances. CalenDates acts as a stand-alone program. Complete descriptions are included, which allow you to use CalenDates to study Holidays you decide not to import into your calendar. CalenDates is an educational program in itself. CalenDates is available in both Palm and Pocket PC versions and works with both Windows and MAC software.