How to remove Time stamp

Hi Gurus

I am using webi 3.1 and using Infocube universe

My problem is when i select calendar date i am able to display time stamp along with date in query prompt (12/02/2011 12:00:00)(MM/dd/yyyy hh:mm;ss)

i dont want to show the time stamp in query prompt as my users dislike to see that timestamp .

I thought In universe we can do it . But i searched the forums related to this but did not found .please help in this . i would appreciate ur efforts

Thanks & regards

Sunil