I actually wrote the script that depends on Date::DateCalcLib, but its use wasn't based on an informed decision; the module was already installed and did what I wanted. Now, I'm supporting our overall Perl development environment and while attempting to upgrade it to the latest Perl release and newer CPAN modules, I realized that I couldn't find the Date::DateCalcLib module for installation. This time around, I'm trying to make an informed decision and couldn't find the information I sought.