diff --git a/xep-0234.xml b/xep-0234.xml
index 79ddd7e5..5a035e1f 100644
--- a/xep-0234.xml
+++ b/xep-0234.xml
@@ -327,7 +327,7 @@
   <file>
     <media-type>text/plain</media-type>
     <name>test.txt</name>
-    <date>2015-07-26T21:46:00</date>
+    <date>2015-07-26T21:46:00+01:00</date>
     <size>6144</size>
     <hash xmlns='urn:xmpp:hashes:2'
           algo='sha-1'>w0mcJylzCn+AfvuGdqkty2+KP48=</hash>
@@ -750,7 +750,7 @@ a=file-range:<offset>-<(offset + length) | *>]]></code>
   <file>
     <media-type>text/plain</media-type>
     <name>test.txt</name>
-    <date>2015-07-26T21:46:00</date>
+    <date>2015-07-26T21:46:00+01:00</date>
     <size>6144</size>
     <hash xmlns='urn:xmpp:hashes:2'
           algo='sha-1'>w0mcJylzCn+AfvuGdqkty2+KP48=</hash>