[Zope] dtml-calendar question.

hi, I'm trying to use the calendar tag as a front end to a calendar database. I have a sql database storing events and a sql method called get_days_events which takes an arguement called startDateString In my dtml-calendar tag I have ... <dtml-var "date.mm()">/<dtml-var "date.dd()">/<dtml-var "date.yy()"> which returns "07/31/00" how do I get this value into the parameter of a dtml-in tag... sort of like this... <dtml-in get_days_events(<dtml-var "date.mm()">/<dtml-var "date.dd()">/<dtml-var "date.yy()">)> <dtml-var EventName><br> </dtml-in> any ideas anyone? cheers tom