[Zope] date problem

Hi- I upgraded from (Zope 2.7.3-0, python 2.3.4, linux2) to (Zope 2.8.0-final, python 2.4.1, linux2). If I use the fmt="%m/%d....", then the date is incorrect. If I don't use the fmt, then my date is logically correct, just not formatted the way I want it. For some reason when I use the "fmt" with the zope variable, it changes my date to exactly one day earlier. For example: SomeDate = "2005/12/02" If I write this code: <dtml-var SomeDate fmt="%m/%d/%Y"> Then I get: "12/01/2005" If I write this code: <dtml-var SomeDate> Then I get: "2005/12/02" Does anybody have an idea what this could be from? I'm guessing its a python2.4 conflict, but not really sure. Any help would be much appreciated!