What can be unclear in this message? Of course, this is not XML at all. Not well-formed "wanna-be-XML" is not XML.
What could "Publication Date" be? If you think it could be an element/tag name, thing again: such name should not contain a blank space character. If you think "Date" could be an XML attribute, you would be wrong again: it should always have a value.
So, it could be
<Publication time="29/04/2015 09:40:53">...</Publication>
Note, I replaced pretty ridiculous word "Date" with "time", more adequate to your sample.
And please don't tell me that this is XML not yours but was given to you by someone. In this case, tell this person that it wasn't XML and ask for real XML. (Sorry if this part of my advice is redundant; I gave you only because too many inquirers behave this way, so it was just in case.)
After all, read any XML manual or specification and only then proceed with your work.