title: Changing Date Format on PDF Signature Stamp
body: <p>I can sign a pdf file, but the time format is too long.
  I wabt to change Date format, but I couldnt..</p>
  
  <p>Here is my code.</p>
  
  <pre><code>PdfReader reader = new PdfReader(input);
  PdfStamper stp = PdfStamper.CreateSignature(reader, output, '\0');
  PdfSignatureAppearance sap = stp.SignatureAppearance;
  **sap.SignDate = DateTime.Now;**
  sap.SetCrypto(null, chain, null, PdfSignatureAppearance.WINCER_SIGNED);
  sap.Reason = "Testování";
  sap.Location = "Praha";
  sap.Acro6Layers = true;
  sap.Render = PdfSignatureAppearance.SignatureRender.GraphicAndDescription;
  PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKMS, PdfName.ADBE_PKCS7_SHA1);
  **dic.Date = new PdfDate(sap.SignDate);**
  </code></pre>
  
  <p>And, at the my pdf file, the signature stamp is like this:
  "2012.11.01 05:21:00 +02:00"</p>
  
  <p>but I want to like that: "01.11.2012 19:21:00"</p>