diff --git a/functions/datetime.xml b/functions/datetime.xml
index efce24ff41..7d095c265c 100644
--- a/functions/datetime.xml
+++ b/functions/datetime.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.56 $ -->
+<!-- $Revision: 1.57 $ -->
  <reference id="ref.datetime">
   <title>Date and Time functions</title>
   <titleabbrev>Date/time</titleabbrev>
@@ -1111,10 +1111,19 @@ print (strftime ("%A.\n"));
       </paramdef>
      </funcprototype>
     </funcsynopsis>
-    <para>
+    <simpara>
      The function expects to be given a string containing an English
      date format and will try to parse that format into a UNIX
      timestamp.  Upon failure, <literal>-1</literal> is returned.
+    </simpara>
+    <simpara>
+     Since <function>strtotime</function> behaves according to GNU
+     date syntax, have a look at the GNU manual page titled
+     <ulink url="&url.gnu.man.date-input;">Date Input Formats</ulink>.
+     Described there is valid syntax for the <parameter>time</parameter> 
+     parameter.
+    </simpara>
+    <para>
      <example>
       <title><function>strtotime</function> examples</title>
       <programlisting role="php">