Analytics Software

i have a small requirement...

I using calendar for my date prompt and date should be in between two dates.
for example 01/20/2009 to 01/20/2009 for the same day and some report should be displayed.
But what i found is that it is not showing any data becuase its taking the format like
01/20/2009 00:00:00 to 01/20/2009 00:00:00
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My requirement is like it should take from
01/20/2009 00:00:00 to 01/20/2009 23:59:59
can it be implemented by using calendar as the prompt.

Please help
Thanks a lot for your help
I will not forgot for you help to reward you all