calendar days does not show the change (change over day), when making a reservation 7-14 day 14 no longer available in the calendar for the following buffer.

I wonder how can I change the time that records in the DB Select check-out at 00:00 instead of 23:59.
because I want the last day of reservation to be available to be booked on a reservation near the beginning

eg

Reservation Date: 02/07/2012 00:00 - 02/14/2012 23:59


Reservation Date: 02/07/2012 00:00 - 02/14/2012 00:00

I think it solve night booking. I wrote it you with e-mail. It's clear?