How can one convert a ""Date/Time"" value to a ""Date Only"" value?

Worked like a charm!  I had done that, but had the wrong field type.  I had Date/Time instead.  So, next question would be, how can i populate a field with the time a field is changed.  Currently, I have this in the formula url, but it still prints the date AND time.  Is there something I can do to make it just print the time?

& "&_fid_20=" & URLEncode (Now())