Why does this line works in Zope 2.3.3 - win2K but not in Zope 2.5.0 - win2K? <dtml-call "REQUEST.set('startDate',_.DateTime('1970/01/01'))"> I just get the following error: Error Type: IOError Error Value: [Errno 22] Invalid argument Traceback (innermost last): File C:\PROGRA~2\ZOPE-2~1.0\lib\python\ZPublisher\Publish.py, line 150, in publish_module File C:\PROGRA~2\ZOPE-2~1.0\lib\python\ZPublisher\Publish.py, line 114, in publish File C:\PROGRA~2\ZOPE-2~1.0\lib\python\Zope\__init__.py, line 158, in zpublisher_exception_hook (Object: Zope) File C:\PROGRA~2\ZOPE-2~1.0\lib\python\ZPublisher\Publish.py, line 98, in publish File C:\PROGRA~2\ZOPE-2~1.0\lib\python\ZPublisher\mapply.py, line 88, in mapply (Object: test2) File C:\PROGRA~2\ZOPE-2~1.0\lib\python\ZPublisher\Publish.py, line 39, in call_object (Object: test2) File C:\PROGRA~2\ZOPE-2~1.0\lib\python\OFS\DTMLMethod.py, line 127, in __call__ (Object: test2) File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DocumentTemplate\DT_String.py, line 473, in __call__ (Object: test2) File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DocumentTemplate\DT_Util.py, line 159, in eval (Object: REQUEST.set('startDate',_.DateTime('1970/01/01'))) (Info: REQUEST) File <string>, line 2, in f File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DateTime\DateTime.py, line 642, in __init__ File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DateTime\DateTime.py, line 1014, in _parse File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DateTime\DateTime.py, line 833, in _calcTimezoneName File C:\PROGRA~2\ZOPE-2~1.0\lib\python\DateTime\DateTime.py, line 395, in safelocaltime IOError: (see above) I could solve this problem by replacing 1970 for 1980. But imaging what would happen if I implement a functionality to search persons who were born on that date. Thanks in advanced, Josef.