How To Compare Date with Just the Day of Month

I have the following date inserted into a DATE field: 07-26-2005 21:00:00

I have some code where I want to see if this date is equal to 07-26-2005, regardless of the time of day.

This is not working form me:
WHERE bcv_start = to_date('$bcv_sdate[$j]', 'MM-DD-YYYY')

(The value of $bcv_date is correct, I have check that several times) Thx,
CC Received on Thu Jul 28 2005 - 08:30:20 CDT