dropdown list doesn't function for 29 february

Hello everybody,
I use Calendar Template. I have remarked a mistake. <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=19090&image=1&table=forumtopics' class='bbc_emoticon' alt=';)' />
There is a issue in the drop down list in Daily view. The drop down list can't select 29th of February. So we can't navigate as we wish.
You can see through this link:
http://xlinesoft.com/livedemo/calendar/caldaily_list.php
Thank you in advance.