[Zope] DTML Method - delete files

[Laura McCord]

I am almost done writing the script but I need to figure out how to
compare two dates. For instance, I have this: <dtml-var ZopeTime
fmt="%m/%d/%Y"> 
                                  <dtml-var modification_date
fmt="%m/%d/%Y"> 

*** Now I need to compare the two dates to see if the ZopeTime is
greater by 5 days.

Any ideas on how to do that using dtml?