Previous reviews also fail to mention that the code does not actually work. The "new" method forgets that the class will be in $_ and thus has an off-by-one error that will make all new objects broken. In fact, the code doesn't even compile! (Bug report filed.)
The module is not packaged properly, it lacks a Makefile.PL and/or a Build.pl, there are no tests and the documentation is lacking. It should not be introduced into the top level namespace and offers little that a good HOWTO for the existing Date or Time modules would do.
This module does very little, is not packaged properly, and unnecessarily uses a top-level namespace. For serious date handling, I'd recommend DateTime.
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