TV Date : only output Time when set

I am sure this is a pretty basic question, but still I am stuck at the moment

I have a List of Events on a Page in MODX Revolution 2.1.1 . For the Date of the events i defined a TV with the type "date" . Now the problem I have is that some events have a date and a time (e.g. 23.06.2011 18:00) others however only have a date (23.6.2011).

in my output chunk i want to display the time (18:00) only if applicable. But so far I don’t know how to output modify the TV.



does not work, since the tv.showdate is never empty.

Then I thought about only displaying the time if it is not the default value (1:00 am) but
will also not work, since the date string is always different.

Of course I can have a workaround by having another TV with input type "text" and just write in 18:00 , but this is not so satisfying

Any suggestions?
Thanks in advance