POST /webservices/Prototype.asmx HTTP/1.1
Host: localhost:99
Content-Type: application/soap+xml; charset=utf-8
Content-Length: 391

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <TestNullDateTime xmlns="http://www.johnweldon.com/">
      <param>1000-01-01T00:00:00</param>
    </TestNullDateTime>
  </soap12:Body>
</soap12:Envelope>