I agree. I'm not sure why you would use DDE for such a simple table instead of PROC IMPORT or the SAS Excel LIBNAME engine.
The worst case scenario if you import a date (using import methods) that is not defined as an Excel date field is that you would have to adjust the value, as explained in this note:
http://support.sas.com/kb/41/000.html
Usually, you can tell whether you need an adjustment because the dates, when imported, will be approximately 60 years off from what you expect.
cynthia