diff --git a/xep-0203.xml b/xep-0203.xml
index 0ac36048..4fd11f09 100644
--- a/xep-0203.xml
+++ b/xep-0203.xml
@@ -92,7 +92,7 @@
   <priority>1</priority>
   <delay xmlns='http://www.xmpp.org/extensions/xep-0203.html#ns'
      from='juliet@capulet.com/balcony'
-     stamp='20020910T23:41:07'/>
+     stamp='20020910T23:41:07Z'/>
 </presence>
   ]]></example>
   <example caption='Receiving Cached Messages from a Conference Room'><![CDATA[
@@ -108,7 +108,7 @@
   </body>
   <delay xmlns='http://www.xmpp.org/extensions/xep-0203.html#ns'
      from='coven@macbeth.shakespeare.lit'
-     stamp='20020910T23:05:37'/>
+     stamp='20020910T23:05:37Z'/>
 </message>
   ]]></example>
 </section1>