diff --git a/functions/datetime.xml b/functions/datetime.xml
index 6956a55b3a..127bdac0da 100644
--- a/functions/datetime.xml
+++ b/functions/datetime.xml
@@ -1,5 +1,5 @@
 <?xml encoding="iso-8859-1"?>
-<!-- $Revision: 1.48 $ -->
+<!-- $Revision: 1.49 $ -->
  <reference id="ref.datetime">
   <title>Date and Time functions</title>
   <titleabbrev>Date/time</titleabbrev>
@@ -166,6 +166,11 @@
         n - month without leading zeros; i.e. "1" to "12"
        </simpara>
       </listitem>
+      <listitem>
+       <simpara>
+	    O - Difference to Greenwich time in hours; i.e. "+0200"
+       </simpara>
+      </listitem>
       <listitem>
        <simpara>
         r - RFC 822 formatted date; i.e. "Thu, 21 Dec 2000 16:01:07 +0200"