XMLGregorianCalendar from String error result

I'm getting a string and trying to convert it to a XMLGregorianCalendar but I'm getting a wrong result.

current code:

Flight flight = new flight();

XMLGregorianCalendar result = null;
Date date = null;
SimpleDateFormat simpleDateFormat;
GregorianCalendar gregorianCalendar;

try {   
    simpleDateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm");        
    date = simpleDateFormat.parse(flightDate);
    gregorianCalendar = (GregorianCalendar)GregorianCalendar.getInstance();
    gregorianCalendar.setTime(date);
    result = DatatypeFactory.newInstance().newXMLGregorianCalendar(gregorianCalendar);
} catch (ParseException ex) {
    Logger.getLogger(FlightBookings.class.getName()).log(Level.SEVERE, null, ex);
} catch (DatatypeConfigurationException ex) {
    Logger.getLogger(FlightBookings.class.getName()).log(Level.SEVERE, null, ex);
}

flight.setDate(result);

So my flight object has this attribute:

protected XMLGregorianCalendar date;

and this function to set it:

public void setDate(XMLGregorianCalendar value) {
    this.date = value;
}

When I then print out the flight objects date using this:

System.out.println(flight.getDate());

I get this:

2014-06-04T09:15:00.000+01:00

But when I marshall it to an XML document using jaxbm, the value shown in XML is:

2014-06-04+01:00

The result I want to save to the XML field should look like this:

04/06/2014 09:15

Any ideas what is going wrong? Thanks.